Streamlined unit reduces muzzle flash with four, 15Adeg helical flutes. Provides Vortex technology for Remington 700 Tactical, Savage, and AR-style .308 rifles. Grooved to accept a Smith Enterprise Direct Connect sound suppressor. Comes with 5/8"-24 thread pitch and .635" thread length to fit Savage 110 FCP bolt action and AR-style .308 rifles with the shorter thread spec, including DPMS and Noveske. Also fits 6.8mm SPC rifles with these muzzle thread specs. Mfg: Smith Enterprise SPECS: 8620 steel. Parkerized, black, matte finish. 5/8"-24 tpi. .635" - 3" (7.6cm) long, .905" dia., .635" thread length. 4.6 oz. (130g) weight. Fits Savage 110 FCP and AR-style .308 rifles from DPMS, Noveske, and others.