This new robust silencer from AAC is engineered for the toughest usage and conditions. With a serviceable front end cap full-auto compatibility and an included 1.375-24 mount the versatile Ranger Series is focused on reliable performance. Removable front end cap Full auto rated 24dB reduction in 300WM with 26a ^2 bolt action 30dB on a 20a ^2 Remington 700 using M80 ammoSpecifications: CALIBERS: 300 Win Mag 308 Win WEIGHT: 17.2oz LENGTH: 6.75 DIAMETER: 1.5" MATERIALS: 718 Inconel and 17-4 H900 Stainless Steel FINISH: High Temp Cerakote ATTACHMENT: 1.375-24 Universal Mount REDUCTION: 24dB 32dB S.P.L.: 138dB