SilencerCo ASR Blast Shield A detachable blast shield designed to mount to any ASR muzzle device, including the Single Port ASR muzzle brake, to reduce muzzle blast and shooter-facing concussion. The shield installs directly to the ASR interface, redirecting high-pressure gases forward and away from the shooter to improve comfort for the shooter and those nearby while preserving the underlying muzzle device when a suppressor is not fitted. Requires an ASR muzzle device to mount; muzzle device sold separately.