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Pro-Tech, Spyderco, Boker & More Automatic Knives


Check out our great deals on many different automatic knives.  Here, we have collected, some of the greatest names in the industry.  For example, look through our great Pro-Tech automatic knives and see some of the highest quality that exists. Many consider Pro-Tech to be the standard bearer in automatic knives.  We also showcase many different Boker automatic knives.  Our Kalashnikov line features some of the best Boker knives available.  We also have many other brands; including such leaders as Microtech, Spyderco, Smith & Wesson and Masters of Defense.  These automatics can be added to your growing collection of fine quality knives, used for everyday carry, or used to start a brand new collection.  Find your personal favorite and buy one today!
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Kershaw Breakout Auto Knife 7000BB, Black and Blue Handle, Bead Blast Blade, KE7000BB Kershaw Breakout Auto Knife 7000OD, Green Handle, Bead Blast Blade, KE7000OD Kershaw Breakout Auto Knife 7000RD, Red Handle, Bead Blast Blade, KE7000RD
List Price: $109.95
Our Price: $69.00
You save $40.95! In Stock
List Price: $109.95
Our Price: $69.00
You save $40.95! In Stock
List Price: $109.95
Our Price: $69.00
You save $40.95! In Stock
Kershaw Breakout Auto Knife 7000BB, Black and Blue Handle, Bead Blast Blade, KE7000BB Kershaw Breakout Auto Knife 7000OD, Green Handle, Bead Blast Blade, KE7000OD Kershaw Breakout Auto Knife 7000RD, Red Handle, Bead Blast Blade, KE7000RD
The Kershaw Breakout Auto Knife is in.  This auto knife has a satin finish plain edged blade made of 14C28N.  The handle is CNC finished machined aluminum with a great spiderweb pattern of grooves on it. This model, the 7000BB, has a black and blue colored handle and a plain edged bead blast blade.   With a slide safety on the backside of the knife and a button trigger on the front, this auto knife has great action and fast, tight lock up.  This USA made knife has tons going for it.  It is ultra thin, light, and comfortable for every day carry.  It also has a reversible (front or back) pocket clip. The Kershaw Breakout Auto Knife is in.  This auto knife has a satin finish plain edged blade made of 14C28N.  The handle is CNC finished machined aluminum with a great spiderweb pattern of grooves on it. This model, the 7000OD, has a green colored handle and a plain edged bead blast blade.   With a slide safety on the backside of the knife and a button trigger on the front, this auto knife has great action and fast, tight lock up.  This USA made knife has tons going for it.  It is ultra thin, light, and comfortable for every day carry.  It also has a reversible (front or back) pocket clip. The Kershaw Breakout Auto Knife is in.  This auto knife has a satin finish plain edged blade made of 14C28N.  The handle is CNC finished machined aluminum with a great spiderweb pattern of grooves on it. This model, the 7000RD, has a red colored handle and a plain edged bead blast blade.   With a slide safety on the backside of the knife and a button trigger on the front, this auto knife has great action and fast, tight lock up.  This USA made knife has tons going for it.  It is ultra thin, light, and comfortable for every day carry.  It also has a reversible (front or back) pocket clip.
Frank Beltrame Stag Horn 9" Italian Stiletto, Fileworked Frank Beltrame Buffalo Horn 11" Italian Stiletto, Fileworked Blade, Auto Knife Frank Beltrame Blond Horn 11" Italian Stiletto, Fileworked Blade, Auto Knife
List Price: $139.00
Our Price: $89.00
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List Price: $199.00
Our Price: $129.00
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List Price: $199.00
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Frank Beltrame Stag Horn 9 Frank Beltrame Buffalo Horn 11 Frank Beltrame Blond Horn 11
The Frank Beltrame Stag Horn Italian Stiletto is produced by Frank Beltrame in Italy.  This stiletto has beautiful stag horn scales, brass liners and pins, stainless steel trigger button, bolsters and slide safety.  This amazing automatic stiletto has great side open action.  The stainless steel blade is a modified bayonet blade with the word "Frank B." and "Italy" stamped at the base. This special edition has filework done on the bottom half of the blade and all the way down the spine of the handle.   An absolute must for any Italian knife collector. The Frank Beltrame Buffalo Horn Italian Stiletto is produced by Frank Beltrame in Italy.  This stiletto has beautiful buffalo horn scales, brass liners and pins, stainless steel trigger button, bolsters and slide safety.  This incredibly built, handmade auto stiletto knife has side open action.  The blade has been fileworked from about halfway down the blade all the way to the base of the handle.  It looks fantastic.  The stainless steel blade is a modified bayonet blade with the word "Frank B." and "Italy" stamped at the base.  An absolute must for any Italian knife collector. The Frank Beltrame Blond Horn Italian Stiletto is produced by Frank Beltrame in Italy.  This stiletto has beautiful blond horn (sometimes referred to as honey horn)  scales, brass liners and pins, stainless steel trigger button, bolsters and slide safety.  This incredibly built, handmade auto stiletto knife has side open action.  The blade has been fileworked from about halfway down the blade all the way to the base of the handle.  It looks fantastic.  The stainless steel blade is a modified bayonet blade with the word "Frank B." and "Italy" stamped at the base.  An absolute must for any Italian knife collector.
Lone Wolf Warrior Black Widow Spider Double Action Automatic Knife, Plain Edge, LWKLD24630 Lone Wolf Warrior Black Widow Spider Double Action Automatic Knife, Part Serrated Edge, LWKLD24633 Piranha Plum Tactical Bodyguard Auto Knife, Plain Edge
List Price: $309.99
Our Price: $242.00
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List Price: $309.99
Our Price: $242.00
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List Price: $200.00
Our Price: $135.00
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Lone Wolf Warrior Black Widow Spider Double Action Automatic Knife, Plain Edge, LWKLD24630 Lone Wolf Warrior Black Widow Spider Double Action Automatic Knife, Part Serrated Edge, LWKLD24633 Piranha Plum Tactical Bodyguard Auto Knife, Plain Edge
Lone Wolf produced a limited edition run of 250 of the Warrior "Black Widow" Double Action automatic knife.  This knife has black micarta grips lasared with the black widow spider on her web.  The Warrior can function as either a manual, one hand opening folder knife by using the thumb stud on the blade.  Or you can open the disguised automatic firing mechanism by sliding the left scale to the right.  This releases the lightning fast blade and it snaps open.  This stealth automatic features a frame and internal components manufactured from heat treated stainless steel--which gives it durability and strength.  The blade is 3 inches long and is built from CPM-S30V stainless steel.  The blade is heat treated, tempered and cryogenically frozen to give it ultimate strenth and edge retention.  The Warrior also comes with a stainless steel pocket clip.  This USA built knife is rugged, fast and comfortable to use and carry. Lone Wolf produced a limited edition run of 250 of the Warrior "Black Widow" Double Action automatic knife.  This knife has black micarta grips lasared with the black widow spider on her web.  The Warrior can function as either a manual, one hand opening folder knife by using the thumb stud on the blade.  Or you can open the disguised automatic firing mechanism by sliding the left scale to the right.  This releases the lightning fast blade and it snaps open.  This stealth automatic features a frame and internal components manufactured from heat treated stainless steel--which gives it durability and strength.  The blade is 3 inches long and is built from CPM-S30V stainless steel.  This model has a part serrated edge.  The blade is heat treated, tempered and cryogenically frozen to give it ultimate strenth and edge retention.  The Warrior also comes with a stainless steel pocket clip.  This USA built knife is rugged, fast and comfortable to use and carry. The Bodyguard by Piranha is a fantastic modern interpretation of the old style stiletto.  With a handle made of ribbed aircraft aluminum that has an anodized plum finish and a plain edged S30V bayonet blade with a black tactical finish, this automatic knife is everything great about automatic knives.  It opens fast and locks up tight.  Made with a titanium pocket clip, this knife is easy to carry and looks great.  All the hardware is black.
Pro-Tech Tactical Response 4 Auto Knife, Stonewash Plain Blade, PTTR4.1 Pro-Tech Tactical Response 4 Auto Knife, Stonewash Part Serrated Blade, PTTR4.2 Pro-Tech Tactical Response 4 Auto Knife, Black DLC Finish Plain Blade, PTTR4.3
List Price: $300.00
Our Price: $210.00
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List Price: $320.00
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Pro-Tech Tactical Response 4 Auto Knife,  Stonewash Plain Blade, PTTR4.1 Pro-Tech Tactical Response 4 Auto Knife,  Stonewash Part Serrated Blade, PTTR4.2 Pro-Tech Tactical Response 4 Auto Knife,  Black DLC Finish Plain Blade, PTTR4.3
Pro-Tech has just released their newest line of Tactical Response automatic knives.  The TR4 series features some serious upgrades from the earlier series.  This knife has a slide safety on the front of the handle that keeps the knife locked when you want it that way.  The black handle, made of anodized 6061 T6 aluminum is comfortable to hold and has a couple of curves that make it easy to keep your grip on this knife.  At the base of the handle on the spine side there is an integral loop for a lanyard and an integrated pommel that can be used as a glass breaker.  The blade is stonewash finished 154CM stainless steel.  The TR4.1 has a plain edge.  At the base of the blade on the spine side the blade has a satin finish.  This gives it a two-tone style look.  This fast firing automatic knife locks up tight.  This is the type of knife you can depend on when things really matter.  The TR-4 is a perfect knife for rescue personnel, military or anyone else that needs a knife that performs reliably at all times.  Comes with a tip up black pocket clip and a very nice black nylon sheath. Pro-Tech has just released their newest line of Tactical Response automatic knives.  The TR4 series features some serious upgrades from the earlier series.  This knife has a slide safety on the front of the handle that keeps the knife locked when you want it that way.  The black handle, made of anodized 6061 T6 aluminum is comfortable to hold and has a couple of curves that make it easy to keep your grip on this knife.  At the base of the handle on the spine side there is an integral loop for a lanyard and an integrated pommel that can be used as a glass breaker.  The blade is stonewash finished 154CM stainless steel.  The TR4.2 has a part serrated edge.  At the base of the blade on the spine side the blade has a satin finish.  This gives it a two-tone style look.  This fast firing automatic knife locks up tight.  This is the type of knife you can depend on when things really matter.  The TR-4 is a perfect knife for rescue personnel, military or anyone else that needs a knife that performs reliably at all times.  Comes with a tip up black pocket clip and a very nice black nylon sheath. Pro-Tech has just released their newest line of Tactical Response automatic knives.  The TR4 series features some serious upgrades from the earlier series.  This knife has a slide safety on the front of the handle that keeps the knife locked when you want it that way.  The black handle, made of anodized 6061 T6 aluminum is comfortable to hold and has a couple of curves that make it easy to keep your grip on this knife.  At the base of the handle on the spine side there is an integral loop for a lanyard and an integrated pommel that can be used as a glass breaker.  The blade is DLC black tactical coated 154CM stainless steel.  The TR4.3 has a plain edge.  At the base of the blade on the spine side the blade has a satin finish.  This gives it a two-tone style look.  This fast firing automatic knife locks up tight.  This is the type of knife you can depend on when things really matter.  The TR-4 is a perfect knife for rescue personnel, military or anyone else that needs a knife that performs reliably at all times.  Comes with a tip up black pocket clip and a very nice black nylon sheath.
Pro-Tech Tactical Response 4 Auto Knife, Black DLC Part Serrated Blade, PTTR4.4 Pro-Tech Godson Automatic Knife, Satin Plain Blade, Maple Burl Inlays, PT706 Slim Spartan II Automatic Knife, Part Serrated, Silver Handle
List Price: $320.00
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Our Price: $185.00
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List Price: $39.99
Our Price: $21.99
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Pro-Tech Tactical Response 4 Auto Knife,  Black DLC Part Serrated Blade, PTTR4.4 Pro-Tech Godson Automatic Knife, Satin Plain Blade, Maple Burl Inlays, PT706 Slim Spartan II Automatic Knife, Part Serrated, Silver Handle
Pro-Tech has just released their newest line of Tactical Response automatic knives.  The TR4 series features some serious upgrades from the earlier series.  This knife has a slide safety on the front of the handle that keeps the knife locked when you want it that way.  The black handle, made of anodized 6061 T6 aluminum is comfortable to hold and has a couple of curves that make it easy to keep your grip on this knife.  At the base of the handle on the spine side there is an integral loop for a lanyard and an integrated pommel that can be used as a glass breaker.  The blade has a DLC black tactical  finish on the 154CM stainless steel.  The TR4.4 has a part serrated edge.  At the base of the blade on the spine side the blade has a satin finish.  This gives it a two-tone style look.  This fast firing automatic knife locks up tight.  This is the type of knife you can depend on when things really matter.  The TR-4 is a perfect knife for rescue personnel, military or anyone else that needs a knife that performs reliably at all times.  Comes with a tip up black pocket clip and a very nice black nylon sheath. The Pro-Tech Godson auto knife has fast action, beatiful workmanship and high quality materials.  This model, the PT706, has maple burl inlays on the 6061 T6 anodized black frame.  The blade is plain edged with a satin finish and is made of 154CM stainless steel.  This highly anticipated 3.25" knife is a smaller version of the ever-popular Godfather automatic.  It is extremely nice.  Compact, smooth opening, this knife is a keeper.  Like all Pro-Tech knives, this auto knife is made with high quality materials to very high specs; for an outstanding product. The Slim Spartan II automatic knife springs open fast and locks up tight when you push the inset trigger button.  Made with a silver zinc handle with holes for a lighter weight, the Slim Spartan II auto knife sports a part serrated bayonet blade made of 440 stainless steel.  Also comes with a tip up pocket clip.   The Slim Spartan II auto knife is a perfect every day carry knife.
Gladiator, Tanto Point Auto Knife, Part Serrated Blade, Silver Handle Knife Tech Automatic Knife, Part Serrated Assassin Automatic Knife, Part Serrated
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List Price: $44.99
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Gladiator, Tanto Point Auto Knife, Part Serrated Blade, Silver Handle Knife Tech Automatic Knife, Part Serrated Assassin Automatic Knife, Part Serrated
The Gladiator automatic knife has a part serrated tanto point blade made of 440 stainless steel.  It has a small, half-oval cutout at the base of the blade.  This knife has an extremely comfortable zinc handle with  jimping on the silver handle right where it meets the base of the blade.  The jimping is on the spine and on the opposite side.  Well built with great, fast action.  The button triggers the blade which locks up very solid.  The blade is extremely sharp right out of the box.  This knife is made in Taiwan. The Knife Tech Automatic Knife features a black handle with various cutouts in it to make it lighter and give you places to get a good grip on the handle.  The handle has jimping on the spine at the base as well as right where it meets the blade to give you even more traction.  The push button is inset to create a safer knife.  The blade is partially serrated and has the word Knife Tech imprinted on it.  This automatic knife is sharp and ready to go.  It also comes with a removable pocket clip (black). The Assassin Automatic knife features a checkered imprint on the black handle.  The push button is inset to make the knife safer.  The handle also sports a small lanyard hole in the base.  THe 440 stainless steel blade is a drop point shape with some modifications.  The blade is partially serrated and has a small hole at the base on the spine side of the blade.  This great auto knife is perfect for the outdoors or for warehouse type work.  It is heavy duty and easy to keep sharp.  Comes with a sivler pocket clip (tip up) that is removable.
Pro-Tech Runt J4, Stonewash Tanto Blade, Black Handle with Carbon Fiber Inlay, PT5404 Pro-Tech Runt J4, DLC Double Ground Tanto Blade, Black Handle, PT5415 Pro-Tech Runt J4, Stonewash Tanto Blade, Black Handle with Ivory Micarta Inlay, PT5451
List Price: $210.00
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List Price: $180.00
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Pro-Tech Runt J4, Stonewash Tanto Blade,  Black Handle with Carbon Fiber Inlay, PT5404 Pro-Tech Runt J4, DLC Double Ground Tanto Blade,  Black Handle, PT5415 Pro-Tech Runt J4, Stonewash Tanto Blade,  Black Handle with Ivory Micarta Inlay, PT5451
Pro-Tech's newest design in the Runt series, the J4, now comes in a tanto blade. This limited edition model, the 5404, has a stunning black  6061 aluminum handle with carbon fiber inlays.  The tanto point blade is double ground and has a stonewash finish.  One of the best Cali-legal series of automatic knives on the market, the Runt J4 is perhaps the most popular of all.  As with every ProTech knife, the finish is top quality and the action on the spring is fast.  If you are looking for a fantastic every day carry auto knife or a knife for your collection, the 5404 will do the job nicely. Pro-Tech's newest design in the Runt series, the J4, now comes in a tanto blade. This limited edition model, the 5415, features a 6061 T6 black aluminum handle.  The tanto point blade is double ground and sports a DLC black finish.  One of the best Cali-legal series of automatic knives on the market, the Runt J4 is perhaps the most popular of all.  As with every ProTech knife, the finish is top quality and the action on the spring is fast.  If you are looking for a fantastic every day carry auto knife or a knife for your collection, the 5415 will do the job nicely. Pro-Tech's newest design in the Runt series, the J4, now comes in a tanto blade. This limited edition model, the 5451, has a stunning black  6061 aluminum handle with ivory micarta inlays.  This gives it the unique "Tuxedo" look that is so popular.  The tanto point blade is double ground and has a stonewash finish.  One of the best Cali-legal series of automatic knives on the market, the Runt J4 is perhaps the most popular of all.  As with every ProTech knife, the finish is top quality and the action on the spring is fast.  If you are looking for a fantastic every day carry auto knife or a knife for your collection, the 5451 will do the job nicely.
Pro-Tech Runt J4, Stonewash Tanto Blade, Black Handle with Maple Burl Inlay, PT5406 Pro-Tech Runt J4, Stonewash Tanto Blade, Black Handle with Cocobolo Inlay, PT5406C Spyderco Embassy Auto Knife, Tactical Black Blade, Part Serrated, C121BKPS
List Price: $210.00
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List Price: $279.95
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You save $99.95! (Out of Stock)
Pro-Tech Runt J4, Stonewash Tanto Blade,  Black Handle with Maple Burl Inlay, PT5406 Pro-Tech Runt J4, Stonewash Tanto Blade,  Black Handle with Cocobolo Inlay, PT5406C Spyderco Embassy Auto Knife, Tactical Black Blade, Part Serrated, C121BKPS
Pro-Tech's newest design in the Runt series, the J4, now comes in a tanto blade. This limited edition model, the 5406, has a stunning black  6061 aluminum handle with maple burl inlays.  The tanto point blade is double ground and has a stonewash finish.  One of the best Cali-legal series of automatic knives on the market, the Runt J4 is perhaps the most popular of all.  As with every ProTech knife, the finish is top quality and the action on the spring is fast.  If you are looking for a fantastic every day carry auto knife or a knife for your collection, the 5406 will do the job nicely. Pro-Tech's newest design in the Runt series, the J4, now comes in a tanto blade. This limited edition model, the 5406-C, has a stunning black  6061 aluminum handle with cocobolo inlays.  The tanto point blade is double ground and has a stonewash finish.  One of the best Cali-legal series of automatic knives on the market, the Runt J4 is perhaps the most popular of all.  As with every ProTech knife, the finish is top quality and the action on the spring is fast.  If you are looking for a fantastic every day carry auto knife or a knife for your collection, the 5406-C will do the job nicely. Spyderco's Embassy auto knife features the traditional spyder hole.  This light, thin, and durable auto knife has a part serrated blade with a black finish.  The blade is made from CPM S30V stainless steel.  The handle is hard anodized machined aluminum and has a G-10 inlay in it.  This all black, tactical auto knife is not one to take lightly.
Pro-Tech J4 Runt Cali-Legal Auto Knife, Custom Damascus Blade, Cocobolo Inlay, PT4406-D Pro-Tech J4 Runt Cali-Legal Auto Knife, Custom Damascus Blade, Carbon Fiber Inlay, PT4404-D Pro-Tech Custom Godson Titaniam Auto Knife, Carbon Fiber Inlay, Satin Brend Blade
List Price: $500.00
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Pro-Tech J4 Runt Cali-Legal Auto Knife, Custom Damascus Blade, Cocobolo Inlay, PT4406-D Pro-Tech J4 Runt Cali-Legal Auto Knife, Custom Damascus Blade, Carbon Fiber Inlay, PT4404-D Pro-Tech Custom Godson Titaniam Auto Knife, Carbon Fiber Inlay, Satin Brend Blade
This custom Runt J4 automatic knife has a Nichols stainless Damascus blade. This is a limited edition custom piece made with a 6061 T6 aluminum frame and cocobolo inlay, the push button features a mosaic pin inlay.   This incredible custom J4 Runt is sure to be extremely rare and in high demand among collectors. This custom knife also comes with pocket clip that is engraved with the Pro-Tech logo as well as the words "Limited Edition" on the clip. This custom Runt J4 automatic knife has a Nichols stainless Damascus blade. This is a limited edition custom piece made with a 6061 T6 aluminum frame and carbon fiber inlay, the push button features matching inlay.  This incredible custom J4 Runt is sure to be extremely rare and in high demand among collectors. This custom knife also comes with pocket clip that is engraved with the Pro-Tech logo as well as the words "Limited Edition" on the clip. This Pro-Tech delight is a custom Godson automatic knife with a Titanium frame that features carbon fiber inlays.  The hand satin finished 6al4v titanium frame is extremely strong and light.  The blade is a Brend, hand finished satin 154-CM and has a plain edge.   The push button on this knife has a carbon fiber inlay also, which matches the frame inlays.  One of the most spectacular knives you will find on the custom market, this custom made automatic knife is a jewel for your growing collection.
Pro-Tech Custom Godson Titaniam Auto Knife, Carbon Fiber Inlay, Satin Brend Blade, Pearl Button Inlay Pro-Tech Godson Auto Knife, G10 Inlay, Satin Finish Plain Blade, PT715 Pro-Tech Godson Auto Knife, Black Handle, Bead Blast Plain Blade, PT720
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Pro-Tech Custom Godson Titaniam Auto Knife, Carbon Fiber Inlay, Satin Brend Blade, Pearl Button Inlay Pro-Tech Godson Auto Knife, G10 Inlay, Satin Finish Plain Blade, PT715 Pro-Tech Godson Auto Knife, Black Handle, Bead Blast Plain Blade, PT720
This Pro-Tech delight is a custom Godson automatic knife with a Titanium frame that features carbon fiber inlays.  The hand satin finished 6al4v titanium frame is extremely strong and light.  The blade is a Brend, hand finished satin 154-CM and has a plain edge.   The push button on this knife has a pearl inlay.  One of the most spectacular knives you will find on the custom market, this custom made automatic knife is a jewel for your growing collection. This highly anticipated 3.25" auto knife from Pro-Tech knives is a smaller version of the ever-popular Godfather automatic..  The Godson knife, like the Godfather, is built of high quality materials.  The handle is 6061 T6 black aluminum and on this model features a G-10 inlay.  The blade is built from 154 CM stainless steel.  This model, the 715, has a satin finish and a plain edge blade.  Durable, compact, and well-built are just a few of the words that can describe this smooth opening auto knife.  Great for every day carry or for your collection. This highly anticipated 3.25" auto knife from Pro-Tech knives is a smaller version of the ever-popular Godfather automatic..  The Godson knife, like the Godfather, is built of high quality materials.  The handle is 6061 T6 black aluminum.  The blade is built from 154 CM stainless steel.  This model, the 720, has a bead blast finish and a plain edge blade.  Durable, compact, and well-built are just a few of the words that can describe this smooth opening auto knife.  Great for every day carry or for your collection.
   
 
Automatic knives come in a huge variety of different styles, shapes, colors, and materials.  We have an extremely large selection of some of the very best brands of auto knives in the world available here on our website.  The following is a quick primer to review different companies and styles of automatic knives.

BLADE STYLES
There are a wide selection of different blade styles available.    
A Clip blade is a blade that has a concave curve shape on the non cutting side of the blade (the spine of the blade where it goes to meet the point).  Sometimes Clip blades with along and gentle concave curve are referred to as a "California" clip and a blade with an extremely elongated concave curve is a "Turkish" clip.  Clip blades are great for detail work but lack some of the strength a thicker blade has.  
A Modifided Clip blade is a newer design that is very popular on high end one handed opening auto knives.  The shape on these vary widely from company to company but some are just a slanted line down to the tip of the blade (no concave curve to the spine at all.  
A Drop Point blade has a very gentle convex curve that goes out to the tip of the blade.  This creates a thicker point on your knife blade and gives you better strength for heavy jobs.  A drop point blade doesn't penetrate as well as a clip point blade.  
A Tanto blade is a traditionally Japanese shape of blade that goes all the way back to fuedal Japan.  The blade actually angles from the edge to the tip of the blade and gives you a much heavier and stronger blade.  A tanto blade is best for piercing, prying and scraping.  Just remember, you can break the tip off of any knife--and manufacturer's generally don't warranty a broken
A Wharncliffe blade is almost like a drop point blade in reverse.  The cutting edge of the blade is straight across.  The spine of the blade curves in a gentle concave shape from the tip all the way back to the handle.

AUTOMATIC KNIFE: STYLE OF OPEN
Automatic knives open in a wide variety of ways.  Here at BladeOps.com, we classify all of our automatic knives that open from the side under the automatic knife section along the top of our website.  If an automatic knife opens by having the blade come out of the front of the handle, we classify that knife as an out the front.  Both styles of knives are, or can be, automatic.  That is just the way we split them up into two different categories.
There are two main ways that side open automatic knives can be built to open.  The most simple way and the most common is with a button.  Many of the very best automatic knives open with a button set on the front scale of the handle.  When you push this button, the blade comes out into the open position.  To close these knives, generally you push the same button and then manually reset the blade back into the closed position.  The trigger button acts as the impetus to open the blade and it often locks it into the open position.  
The next style of automatic knives are dual action knives.  Dual action and double action often get confused.  A dual action knife is a knife that has more than one method to deploy the blade.  For instance, the blade can be opened manually.  You can pull the blade out of the closed position and lock it into the open position by hand.  Or, you can trigger a button that opens the blade automatically.  A recent example of this is ProTech's Defiance series of automatic knives.