Spring Assist - 'Out-The-Front' Viper 3rd Gen. OTF - Black
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Applies to delivery within the 48 contiguous states only.

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  • Blade: 3 1/2in
  • Closed: 5 3/10in
  • Overall: 8 3/4in
  • Steel: 4034 Stainless Steel
  • Handle: Aluminum
  • Weight: 4.9 oz.

The Viper series of Out-The-Front spring assisted knives are the most streamlined OTF models yet! They offer a bayonet style, double edged blade, housed within a compact Aluminum case. The blade is forged using 4034 Stainless Steel.

To open, start the process by pushing the blade forward using the handle's side access, and the spring assisted technically will do the rest. Once the blade fully extends, it automatically locks into place.

To close, slide the blade downward using the side access, which will release the lock and move the blade back into the handle.

There is a safety switch on the handle, and a red dot will be visible when the safety is off. The handle also features a glass breaking spike and pocket clip.

Product Specifications:

  • 3 1/2 in. blade, 8 3/4 in. overall opened.
  • 4023 Stainless Steel blade.
  • Aluminum handle.

How are Spring Assist different from a Gravity Knife or Switchblade Knife?

Gravity or Switch Blade knives feature a button, level, or other type of switch that releases a spring pressure to automatically open the blade. On a Spring Assist knife, there is no separate button or switch. Instead, you apply pressure to part of the blade to begin the opening process. This is usually a small bump of metal which sticks out under the knife, making it fast and comfortable to use. Once you press on that part of the blade, it automatically opens and locks into place. Since the action of opening the knife is started by pressing the blade metal, instead of a button or switch, it is considered to bypass the laws which ban Switch Blade kniv

Customer Reviews | Average Rating: 4.33 out of 5
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1 - 10 of 27 Reviews (View All)
Worth it to look cool Reviewed by on Dec 26, 2016   3 out of 5

Cheap steel, the type used is just barely better than that used in replica fantasy swords. It is well made overall however, and a great improvement on the original design.

Great knife Reviewed by Charles Frazier on Aug 15, 2015   5 out of 5

have been looking for a new assisted open knife and bought this one. great knife. with a little practice you can easily open it with one hand. all metal construction. good buy!!

just not quite there Reviewed by Pete on Apr 06, 2015   2 out of 5

The knife is well made - all metal construction, blade locks up nicely, etc. - but poorly designed. The switch mechanism travels down a slot in the handle the length of the blade; you must operate it from behind and keep your fingers out of the way. This makes it a two hand operation unless you operate it from an overhead stabbing position. The blade sharpens nicely, but is a little thin for self defense. You couldn't get a piece of typing paper under the pocket clip. It needs a lot of loosening. I think they should charge ten more dollars and make a really nice one or stick with spring assisted folders. The blade deploys rocket fast, but the awkwardness of operation makes it very slow to use.

So far so good Reviewed by Doug on Feb 12, 2015   4 out of 5

I saw a friend of mine purchased one of these knives I liked the way it worked with one hand the assist spring could be a little stronger though and I wish the overall knife was a little larger so all in all it's a good little knife.

Was happy at first Reviewed by David Parkison on Jan 21, 2015   1 out of 5

I was very happy at first but after only having it a few months it won't open. It happened once before and started opening again but now it won't open at all. Feel like I wasted my money.

Awesome knife Reviewed by Jacob L. on Jan 03, 2015   5 out of 5

Awesome knife! I've been contemplating buying one for awhile, but man I'm glad I did. The handle feels great, the blade is SHARP! And it feels good in my pocket. I would highly recommend this knife or any of the other Schrade Viper's to anyone wanting to add an OTF to their collection.

Excellent! Reviewed by Teri LaFaye on Dec 30, 2014   5 out of 5

Excellent knife! Got it for Christmas. Easy to work. Stays sharp and not too heavy to carry. The lock is awesome. Would highly recommend.

out standing knife Reviewed by bailey m on Dec 23, 2014   5 out of 5


Solid Product Reviewed by Estaban on Oct 12, 2014   4 out of 5

Solid product, however the blade can use some work(Sharpened to razor.) The controls take a little while to become familiar with. Outside of that, cost and quality is an even A-

Highly Recommended Reviewed by Chris on Jun 23, 2014   5 out of 5

Bought SCHRADE Viper OTF Dagger NON serrated on 6/16 and recieved it 6/21. Highly Recommended because of the quality of product and the quality of the spring action while maintaining a very strong safety. Will tell other knife enthusiast I know about product.

1 - 10 of 27 Reviews (View All)