Phantom QD Adapter 

The STC Phantom QD Adapter is designed to work with our new Phantom Muzzle Brake. This adapter features a locking mechanism which once threaded onto the Muzzle Brake can lock in place. The Phantom QD Adapter is very similar to the SICO ASR bravo adapter and works with the SICO muzzle brakes as well. ASR Bravo Adapter

Specifications:

• Heat Treated GB 40CR Alloy Steel (Black Oxide)             SICO ASR Adapter
• Internal ACME Threads that are compatible with our Phantom Muzzle Brake
• External threads are 1.375×24 TPI
• Weight 3.55 oz.       SICO ASR Adapt