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Questions & Answers
What is the thread dimensions at the end of this device? Thx Expert Answer

Griffin Armament does not provide the thread pitch for the A2 Blast Shield/Optimus A2 Mount Muzzle Device. They state it can be used on 5.56mm AR's to and with the 30SD flash comp it will support centerfire calibers up to .308 Winchester. I would recommend reaching out to them directly for more specific information.

by Ethan, Gear Expert, May 6, 2022
Can you put a SilencerCo ASR mount (Charlie or bravo) to this? Manufacturer Answer

No. The Optimus A2 Adapter has 1.2875x24 threads that will work with suppressors like the Griffin Armament Optimus, Revolution, And Resistance series of suppressor. Griffin Armament does offer the A2 adapter for 1.375x24 suppressors. This would allow this interface to be threaded into SilencerCo Bravo threaded suppressors. If this question is asking about compatibility of ASR Muzzle Devices with this interface, this would not be compatible. This adapter is to use certain Gate Lok muzzle devices (hammer comp and flash comp compatible) or USGI A2 government contract compliant muzzle devices. If using this muzzle device with another manufacturer's a2 style muzzle device, it would need to be made to the mil spec in terms the dimensions of the outer diameter, blank firing adapter ring, overall length and wrench flats.

by Griffin Armament, Manufacturer, May 25, 2022
Customer Reviews
Helpful Positive Review Works perfectly by Proud American citizen, October 11, 2020
What can I say, if you take the dive into the ATF swap of tyranny and infringements on our constitutional rights I recommend your first suppressor being a multi caliber. With that being said after getting an amazing product from griffin I needed a q...
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Condition: New Color: Black

Code: 28N-MD3-GRI204-GAOPTA2

MPN: GAOPTA2

UPC: 791154082645

List: $175.00Save 10%
$157.94

Product Info for Griffin Armament A2 Blast Shield/Optimus A2 Mount Muzzle Devices

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 8.4in OAL 17.4 ounce, A2 mounted configuration.image

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 16in.

12.5in 6.8SPC

8in 7.62x39

8in 300BLK super or subsonic

10.5in 5.56mm

Compatible Griffin Mounts:

M4SD Tactical Comp, M4SD Flash Comp, M4SD Paladin Brake, M4SD Hammer Comp, 30SD Flash Comp, A2 compensator

Mounting Instructions

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.

Compatible Griffin Mounts: M4SD Tactical Comp, M4SD Flash Comp, M4SD Paladin Brake, M4SD Hammer Comp, 30SD Flash Comp, A2 compensator. Mounting Instructions 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.

Specifications for Griffin Armament A2 Blast Shield/Optimus A2 Mount Muzzle Devices:

Manufacturer: Griffin Armament
Condition: New
Color: Black

Features of Griffin Armament A2 Blast Shield/Optimus A2 Mount Muzzle Devices:

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

Package Contents:

  • Griffin Armament A2 Blast Shield/Optimus A2 Mount Muzzle Devices

Griffin Armament A2 Blast Shield/Optimus A2 Mount Muzzle Devices Orderable Models

List of Orderable Models

Griffin Armament A2 Blast Shield/Optimus A2 Mount Muzzle Device, Black, GAOPTA2 , MPN: GAOPTA2 , UPC: 791154082645 , Code: 28N-MD3-GRI204-GAOPTA2

Griffin Armament A2 Blast Shield/Optimus A2 Mount Muzzle Devices Unavailable & Discontinued Models

List of Unorderable Models

USED Griffin Armament A2 Blast Shield/Optimus A2 Mount Muzzle Device, Black, GAOPTA2, EDEMO5, Used, Condition Like New , MPN: GAOPTA2-EDEMO5 , Code: 28N-MD3-GRI204-GAOPTA2-EDEMO5
USED Griffin Armament A2 Blast Shield/Optimus A2 Mount Muzzle Device, Black, GAOPTA2, EDEMO6, Condition Like New, Inspect and Rebox , MPN: GAOPTA2-EDEMO6 , Code: 28N-MD3-GRI204-GAOPTA2-EDEMO-RE-A
USED Griffin Armament A2 Blast Shield/Optimus A2 Mount Muzzle Device, Black, GAOPTA2, EDEMO4, Condition Fair, Used , MPN: GAOPTA2-EDEMO4 , Code: 28N-MD3-GRI204-GAOPTA2-EDEMO-US-D
DEMO, Griffin Armament A2 Blast Shield/Optimus A2 Mount Muzzle Device, Black, GAOPTA2 , MPN: GAOPTA2-DEMO , Code: 28N-MD3-GRI204-GAOPTA2-DEMO
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