Combines the performance of both a dedicated flash hider and a dedicated compensator. Patent-pending AFAB(TM) technology employs a complex matrix of tiny passageways that slowly diffuse and cool combustion gases so you can stay on target during rapid fire engagements while effectively suppressing muzzle flash and side concussion. Closed bottom design reduces dust signature when shooting prone. Precision machined from heat treated stainless steel with an advanced IonbondA(R) high temperature CrCN coating for extreme durability. Fits .223/5.56mm rifles with 1/2-28 muzzle threads. Features pilot hole for permanent pinning to bring 14.5" barrels to legal length. Accu-Washer(TM) Mu Mfg: Precision Armament SPECS: 400 series stainless steel. HRC 26-32. IonbondA(R) CrCN finish - matte black. .865" diameter, 2.225" long, 3.0 oz.(85g) weight. Fits .223/5.56mm, 1/2-28 threads.