Q Plan-B Silencer Mount .30 Cal 17-4 Stainless Steel Copper Copper. As you'd expect we accomplish this by utilizing tapers on both the Cherry Bomb and the Plan-B mount. This provides a better lock-up thanks to increased surface area guarantees improved alignment of your silencer and protects your threads from carbon exposure. No shims washers latches springs gimmicks or timing of the muzzle device required Specifications for Q Plan-B Silencer Mount: Manufacturer: Q Color: Copper Finish: Copper Projectile Caliber: .30 Caliber Package Contents: Q Plan-B Silencer Mount Q PLAN-B-ASR: Plan-B Silencer Mount .30 Cal 17-4 Stainless Steel Copper Copper