Schrade Viper OTF Assisted Opening Pocket Knife Dagger

  4.3 ( 26 reviews)

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Part #:19 SCHOTF3B
  • Blade: 3 1/2in
  • Closed: 5 3/10in
  • Overall: 8 3/4in
  • Steel: 4034 Stainless Steel
  • Handle: Aluminum
  • Weight: 4.9 oz.
This Item Cannot Ship to the Following States: NY


The Schrade Out the Front Viper Assisted Open Knife is the third generation of OTF knives from Schrade. This model features a bead blast finished bayonet style blade that is sharp on both edges. This fast opening assisted knife slides open when you begin the process by pressing the slide trigger on the side. The blade locks up incredibly tight when open. On the front of the extremely comfortable, thin handle, there is a toggle safety that shows a red dot when it is ”live” and ready to fire. To close the blade, you slide the blade lock which releases the blade--which you then slide down and reset using the slide trigger. This is one of our favorite spring assisted out the front knives. It comes with a deep pocket clip and a glass breaker is built into the base of the handle. Get fast--get the Viper!

Customer Reviews | Average Rating: 4.31 out of 5

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Customer Reviews

Jan 02, 2019
(5 out of 5)

Better buy this one outstanding


Dec 26, 2016
(3 out of 5)
Worth it to look cool

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.

Charles Frazier
Aug 15, 2015
(5 out of 5)
Great knife

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!!

Apr 06, 2015
(2 out of 5)
just not quite there

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.

Feb 12, 2015
(4 out of 5)
So far so good

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.

David Parkison
Jan 21, 2015
(1 out of 5)
Was happy at first

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.

Jacob L.
Jan 03, 2015
(5 out of 5)
Awesome knife

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.

Teri LaFaye
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.

bailey m
Dec 23, 2014
(5 out of 5)
out standing knife


Oct 12, 2014
(4 out of 5)
Solid Product

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-

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