Breek-LOK Void Mount for 5.56 NATO and .223 Rem for Breek-Lok 3QD. A minimal, no-frills muzzle device with quick-detach Breek-Lok compatibility. Specs: Material steel (4140 hardened), Finish black nitride, Overall length 1.25 inches, Weight 1.6 oz, Threads 1/2x28, Caliber 223/556, Color Black. Contents: 1 mount with Peel Washer included. Made in America.