AR-9 VIPER Compensator 1/2"-28 QPQ Coated

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3 week lead time

Solo orders or purchased with in stock items have all shipped. Fulfilling others as quickly as possible. 


9mm VIPER in 1/2"-28

Our line of compensators redirect and disperse muzzle gasses to effectively reduce, if not completely eliminate, both muzzle rise and felt recoil. The significant reduction in muzzle climb and felt recoil allows for faster, more accurate follow-up shots.

Threaded 1/2"-28 and bored for standard 9mm

Material: Carbon Steel

Length - 2"

Height - .75"

Width - .95"

Weight: 2.2oz


Crush washer included.

3 Reviews

  • 4
    AR9 Viper Compensator

    Posted by Tim Rollins on Jul 16th 2020

    Very well machined and coated. Haven't had a chance to test it yet. Other reviews were favorable.

  • 5
    Best Accessory I have ever bought!!!!

    Posted by Rick Liebespach on Jun 12th 2020

    I bought this for my KelTec Sub 2000. The stock S2K had quite a bit of kick, considering it is only a 9mm. I just got back from the range, where I shot my S2K for the 1st time with the AR-9 Viper Compensator.
    What a difference!!!
    The S2K now has a recoil close to a .22lr..... it is maybe 80% less than it was before! (at least it feels like that to me)
    I hate to say something that may result in this costing someone else more money (I paid $22.50), but this would have been money well spent at twice the price!
    If there is ever another product I need/want, that they have.... I"m buying from them!

  • 5
    AR 9 Viper Comp

    Posted by Dennie Vega on May 14th 2020

    Looks great, well made and quality machined. Venom Defense always has fast shipping and great service too. The comp works well regarding compensation and makes it easier to stay on direct, especially considering how jarring direct blowback can be, even though in this case it's only 9mm. I used this one on my PSA AKV and it looks DOPE! I'll be purchasing another for my PTR 9K as soon as it arrives at my FFL (no Im not an MP5 purist...). Great job guys. I've also purchased the Mjolnir pistol grip for one of my AR builds and love it too.