The (ASR) Active Spring Retention Mount is a quick-attach and detach system for your suppressors that works with the ASR Flash Hider, ASR Closed-Tine Flash Hider, ASR Muzzle Brake, and ASR Single Port Muzzle Brake. It is one of the top-performing mounting systems for rifles. The locking ring prevents the suppressor from rotating during use. The mount fits over your ASR Muzzle Device and creates a direct connection to your suppressor, allowing you to use the muzzle device with the suppressor for enhanced performance.