A2 blast shield / Optimus A2 mount

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The A2 blast shield provides concussion mitigation to A2 muzzle devices, and Griffin Armament SDQD flash comps, as well as Griffin SDQD muzzle devices which are A2 length (listed below). Compatible with the Minimalist brake shield thread protector, and also capable of converting the Optimus silencer to an 8.4" OAL 17.4 ounce, A2 mounted configuration.

The device and the collar are both compatible with the car stock wrench tool included with the Optimus silencer. Additionally a strap wrench (not included) may provide useful utility especially when removing accessory mount interfaces from the Optimus silencer.

Weighing 5.7 ounces, the Optimus A2 mount can be used on 5.56mm AR's to and with the 30SD flash comp it will support centerfire calibers up to .308 Winchester.

Minimum barrel length caliber ratings [A2 mounted Optimus silencer with taper lok baffle]:
.308 on barrels down to 16".
12.5" 6.8SPC
8" 7.62x39
8" 300BLK super or subsonic
10.5" 5.56mm

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 

The rear slip-coupler unscrews completely from the main body of the Blast shield. The coupler is slipped over the muzzle device at a 45 degree angle, then straightened (with the threads away from the barrel) to allow the coupler to slip into the rear accessory/BFA ring of an A2 device. The tapered end of the main body of the Blast Shield is then inserted between the coupler and the muzzle device. The coupler is then re-threaded onto the main body of the Blast Shield while still in the accessory ring.

We do not study the myriad of devices on the market. If a company wants to see if their device is compatible they can send us a blueprint of the device and a sample. Email: Tech@griffinarmament.com

Additional Details


14 Reviews

  • 5
    A2 Blast Shield / Optimus A2 Mount

    Published by Henry Bowman on 27th Aug 2022

    Rock solid lock up. This thing is genius. And it saved me a ton of money on muzzle devices.

  • 5
    Eady Install

    Published by Andrew on 29th Jun 2022

    Put on my copperhead in a minute or so. Looks cool, just waiting on my suppressor now. Wish it would've come with the thread protector. Go ahead and order it with this.

  • 5
    Great product

    Published by Neil O on 27th Jun 2022

    As with all Griffin products this thing is amazing. Super tight fit in the muzzle break. I was worried there would be play in it but yes super tight. Very happy!

  • 5
    Buy this first

    Published by R Smith on 7th Oct 2020

    Should have bought this first. I purchased a lot different accessories that replaced my standard A2 birdcage on my yeet sticks. Now anything that has the standard birdcage is fair game.

  • 5
    Fantastic Product

    Published by Matt B on 3rd Aug 2020

    The fit and finish this company brings to thee table is astonishing. The A2 mount is no exception. This attaches in seconds and is a great attachment option for firearms where you don't want to remove the standard muzzle device. Highly recommended.

  • 5
    A2 Blast Shield

    Published by Shawn on 1st May 2020

    The fit and finish on this mount is beyond what I expected, extremely precise machining. Installation is about as easy as it can be and provides a very solid mount for my Optimus.
    As others have mentioned it doesn't quite work with a 5/8x24 A2 flash break, so might want to consider another mount or picking up the 30SD as well.
    Over all I'm very happy with this mount and would not hesitate to purchase again.

  • 5
    Works with PSA A2!

    Published by Lou on 10th Dec 2019

    I mainly got this for my PSA rifles that have their own A2. And they work great!

  • 5

    Published by William Marrero on 6th Nov 2019

    I love it because my rifle is not allowed to be modified this part is perfect went thru 3 mags nothing got loose worked perfect

  • 5
    I like it

    Published by Seth on 4th Oct 2019

    I am a cheap and lazy person. Most of my hesitance about using my Optimus suppressor on my ARs is due to not wanting to buy a new muzzle break for each and install them. This blast shield installs easily and works well in conjunction with my suppressor.

  • 4
    optimus A2 mount

    Published by Unknown on 10th Sep 2019

    works good very convenient

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