A2 adapter for 1.375x24 suppressors

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This A2 mount interface provides a high quality mounting interface for Griffin Armament GATE-LOK Flash comps, Hammer Comps, and mil-spec A2 birdcage flash hiders.  PLEASE DO NOT ASK OUR CUSTOMER SERVICE DEPT what other companies mounts work with this device.  There may be others, but we can only tell you that it works with our devices and mil spec A2 flash hiders. 

The device and the collar are both compatible with the GRIFFIN ARMORERS WRENCH , GRIFFIN 1.375x24 WRENCH, and GRIFFIN REVOLUTION WRENCH.

Weighing 5 ounces, the A2 adapter mount can be used on 5.56mm AR's or with the 30SD flash comp it will support centerfire calibers up to .308 Winchester.

Current compatible Griffin mounts:

Legacy Griffin compatible mounts:

  • M4SD Paladin Brake
  • M4SD Tactical Comp

This mount is NOT compatible with the GATE-LOK™ Stealth Flash Hider 5.56mm 1/2x28 


Mounting Instructions

See Youtube mounting video


Additional Details


12 Reviews

  • 5
    Works as should

    Published by Brent on 1st Mar 2024

    Finish very nice, machined well. Fit on to my Omega 300 perfectly.

  • 5
    A2 adapter for 1.375x24

    Published by Robert Henry on 26th Sep 2023

    Performed very well on my YHM R9. Easily installed on all my A2 Flash hiders and also worked on the BCM Extended A2 Flash hider.

  • 5
    A2 mount

    Published by Anthony D. on 20th Sep 2023

    Precision machining, perfect fit. Easy to use.

  • 5

    Published by Matthew Griffin on 20th Aug 2023

    Definitely seems pricy for what it is going in...but once it's in your hands you'll probably understand. Once you realize how exact the tolerances are (and must be) to ensure a solid and true lock up, and minimize the gap between the muzzle device and the threaded "sleeve" that must slide over and cover it, it starts to make sense.

    Well made, zero side-to-side or front to back play. Rotational play will depend on your muzzle device, though shouldn't affect anything. A happy surprise, not noticed/pictured/mentions are the three prongs inside the 1.375 end of the device. These prongs/teeth will index/lock in to A2 devices that have a crenulated end. I have a couple 2A Armament T3 "comps" (flash hiders with extra ports for comp/brake effect), and it was a happy surprise that the "sleeve"/inner portion of this adapter indexes and locks into place; Thread the inner sleeve most of the in, feel the teeth lock in to the crenulations on the comp, and the torque it down the rest of the way via the outer sleeve that holds on to the bayonet groove on the A2.

    Inner sleeve/1.375 portion works with a standard 3 prong castle nut wrench. Outer/rear portion works with a standard "1 prong" spanner type castle nut wrench.

    Really just came here to say that it works with the 2A T3 comp, but as you can tell I'm pretty pumped on this thing at the moment and couldn't resist saying a few more words ?.

  • 5
    Simple and clean

    Published by Steve Rawson on 20th Jun 2022

    Works great for all things A2 flash hider. Locks up tight with no wobble

  • 5
    Excellent Product

    Published by Him on 23rd Feb 2022

    Excellent machining and fit. The only thing I would say is that if they were to shorten the front of the outside collar and rear of the adapter it would work great with VG6 Epsilons and Gammas.

  • 5
    Great concept

    Published by Mark on 23rd Sep 2021

    Well made and very convenient for any mil-spec flashhider

  • 5
    A2 Adapter 1.375x24

    Published by SS on 7th Jul 2021

    I've been looking for this solution for years. Shipping was faster than expected. Threaded onto Silencerco Omega and worked perfectly. At $100 per proprietary muzzle device do it this way and save money if you have more than one you want to mount to. Wish I had it 5 years ago. Only thing I would change is add knurling to the cap. Well done!

  • 5
    Great adapter

    Published by Jon Lasseter on 31st Mar 2021

    Use this adapter with my form 1 can and my custom muzzle brake and it works great and keeps everything aligned

  • 5
    A2 adapter mount

    Published by Bryan Corbitt on 9th Dec 2020

    Works like a charm and fits 22 caliber and 30 caliber mil-spec birdcage flash hiders like a glove. When I get more rifle cans I will get more of these adapters.

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