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Schrade Viper OTF Assisted Folding Knife, 3.5in

USED Schrade Viper OTF Assist Folding Knife,3.5in, Black Alumium,Double Edge Black Plain SCHOTF3CB, EDEMO1
USED Schrade Viper OTF Assist Folding Knife,3.5in,Gray Aluminum,Double Edge Black Plain SCHOTF8B, EDEMO3
Schrade Viper OTF Assist Folding Knife,3.5in,Aluminum Handle,Double Edge Plain SCHOTF3C, EDEMO1
USED Schrade Viper OTF Assist Folding Knife,3.5in, Black Alumium,Double Edge Black Plain SCHOTF3CB, EDEMO1
1 of 3 images
USED Schrade Viper OTF Assist Folding Knife,3.5in, Black Alumium,Double Edge Black Plain SCHOTF3CB, EDEMO1
USED Schrade Viper OTF Assist Folding Knife,3.5in,Gray Aluminum,Double Edge Black Plain SCHOTF8B, EDEMO3
2 of 3 images
USED Schrade Viper OTF Assist Folding Knife,3.5in,Gray Aluminum,Double Edge Black Plain SCHOTF8B, EDEMO3
Schrade Viper OTF Assist Folding Knife,3.5in,Aluminum Handle,Double Edge Plain SCHOTF3C, EDEMO1
3 of 3 images
Schrade Viper OTF Assist Folding Knife,3.5in,Aluminum Handle,Double Edge Plain SCHOTF3C, EDEMO1

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Questions & Answers
How do I fold the knife once it's open? Expert Answer

The blade is retracted, not folded. The blade exits the grip parallel to the grip, and does not pivot. It's a lot like the German Paratrooper gravity knife, just assisted opening.

Unlike the gravity knife, you are retracting against spring pressure.

Release the lock, and pull the protuberance on the side rearwards until the blade is retracted and locks in place.

Mark H.

by Mark H., Gear Expert, January 19, 2018
View All Q&A You Have a Question? Ask!
Customer Reviews
Helpful Positive Review
Excellent knife by William, July 16, 2018
The Schrade Viper is an amazing knife. It feels well put together, it is a little on the heavy side which I like. The spring that helps deploid the blade feels strong too. I loved it. Thank you Optics Planet.
2/2 found this helpful
Helpful Positive Review
Schrade Viper by fireball, Verified Owner, January 22, 2016
I actually purchased this as a replacement for a different AO knife that has been out of stock fro over two months. I thought it would be a nice little novelty item to have around until the other order was finally fulfilled however, after having the...
Read More...
10/10 found this helpful
Helpful Positive Review
Quick release blade by Matt, September 11, 2016
Nice knife with a very explosive spring action. Has a safety button to protect the user from accidental discharge of the sharp blade. Overall good quality but a little too heavy. Strong material and good looking.
6/6 found this helpful
Helpful Positive Review
Backup knife by Gene, Verified Owner, June 9, 2017
Got this knife to put in my emergency bag , tucks in bag nicely and will fit in pocket of cargo pant's with no problem . Strong spring and solid lock , will make a good knife for backup if something happens to large belt knife .
2/2 found this helpful
Helpful Negative Review
Lieutenant by No nickname, May 26, 2018
Poor design flaw makes one hand deployment of the blade awkward. Hand must be adjusted after opening blade to safely use the knife.I liked the unique design of the knife`s blade. Spring loaded assist in deploying the blade and affordable price makes...
Read More...
1/2 found this helpful
Most Recent Reviews
Terrible Design by Werewolf, Verified Owner, January 24, 2021
The design of this knife is not only terribly impractical but also dangerous! The blade deployment switch is located at the rear end of the handle, meaning the knife must be held upside down in order to deploy the blade. The blade deployment sw...
Read More...
1/2 found this helpful
Read All 7 Reviews
Blade Length:
3.5 in
Closed Length:
5.3 in
Blade Material:
4034
Serrated:
Plain
Overall Length:
8.8 in
Included Accessories:
Glass Breaker, Pocket Clip
Handle Material:
Aluminum
Handle Length:
5.3 in
Handle Color:
Black
Handle Finish:
Bead Blast
Blade Finish:
Stainless Steel
Blade Shape:
Double Edge, Recurve, Spear Point
Lock Type:
Safety Lock
Condition:
New
Opening Method:
Assisted Opening, Blade Slider
Weight:
4.9 oz
Quantity:
1
Package Type:
Box
Color:
Black

Code: SRD-KN2-VPROTF-SCHOTF3C

MPN: SCHOTF3C

UPC: 044356222464

Product No Longer Available

Product Info for Schrade Viper OTF Assisted Folding Knife, 3.5in

Carry this Schrade Viper OTF Assisted Folding Knife for self-defense, tactical, or everyday purposes. Schrade built these Assisted Opening Knives tough, with a 4034 stainless steel blade with a titanium nitride finish that's incredibly reliable and resistant to wear and corrosion over time. Plus, the aluminum handle adds to the strength of this knife while helping reduce the weight a bit. The Schrade Viper Out The Front Assisted Folding Knife also includes an integrated glass breaker to help you during an emergency situation. For your protection, these knives contain a safety lock that prevents the blade from unintentionally deploying. You can also easily carry this EDC tool using the stainless steel pocket clip. Be prepared for any scenario by equipping the Schrade Viper OTF Assisted Opening Knife.image

Features of Schrade Viper OTF Assisted Folding Knife:

  • 4034 stainless steel blade with black titanium nitride finish
  • Out-the-front spring-deployed mechanism
  • Safety lock
  • Stainless steel pocket clip
  • Integrated glass breaker

Package Contents:

  • Schrade Viper OTF Assisted Folding Knife, 3.5in

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Schrade Viper OTF Assisted Folding Knife, 3.5in Unavailable & Discontinued Models

List of Unorderable Models

  • Schrade Viper OTF Assist Folding Knife,3.5in,Aluminum Handle,Double Edge Plain SCHOTF3C , MPN: SCHOTF3C , UPC: 044356222464 , Code: SRD-KN2-VPROTF-SCHOTF3C
  • Schrade Viper OTF Assist Folding Knife,3.5in, Black Alumium,Double Edge Black Plain SCHOTF3CB , MPN: SCHOTF3CB , UPC: 044356222471 , Code: SRD-KN2-VPROTF-SCHOTF3CB
  • Schrade Viper OTF Assist Folding Knife,3.5in,Gray Aluminum,Double Edge Black Plain SCHOTF8B , MPN: SCHOTF8B , UPC: 044356222600 , Code: SRD-KN2-VPROTF-SCHOTF8B
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Last updated 2026-09-05 UTC.