The Razor762 is made from 17-4 from PH stainless steel and has a cerakote finish. It fits 7.62mm caliber and is rated up-to .300 RUM. Sound levels are rated at 189.7dB for 300BLK, 138.7dB for 5.56mm, and 143.8dB for .308. It features interchangeable front caps, monolithic 17-4 PH stainless steel mount, and quick detach dual taper locking system. Included is a 7.62 R3 Flash hider (5/8x24 thread pitch), and 7.62 front cap. Brand Rugged Suppressors Category Suppressors Model Razor762 Caliber 7.62mm Color Black Cerakote OAL 6.40" Material Stainless Steel NRR 129.70 dB / 138.70 dB / 143.80 dB Diameter 1.50" Thread Pattern 5 / 8"x24 Weight 15.30 oz