Griffin Armament A2, Optimus Interface

The Griffin Armament 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" 6.8SPC8" 7.62x398" 300BLK super or subsonic10.5" 5.56m...