This tri-lug adapter gives you the ability to quickly attach a sound suppressor when shooting suppressed. Featuring a universal 3-lug interface, this 3-lug muzzle device can quickly interface with any pistol caliber sound suppressor as well as the Angstadt Arms 3-Lug QD Blast Shield!

Features :

• Made from hardened steel with a black nitride finish
• Does not require the use of shims. Shims can be used if specific timing is desired. Do not use a crush washer
• 1/2×28 thread pitch
• "1.42" long"
• 0.9 oz