Bushmaster has designed this suppressor so that you can maintain your weapon's accuracy. They have accomplished this by ensuring that their suppressors' concentricity is machined to tight tolerances. Thus, providing a minimal point of impact shift. Bushmaster utilizes different suppressor technologies to promote its custom baffle design, which helps with felt recoil, flash, and sound reduction. Caliber Rating: Up to 5.56 NATO (.223 REM) Length: 6” Material: 17-4 H1150 Stainless Steel Barrel Thread Pitch: ½” x 28 Outer Diameter: 1.5” Weight: 1.1 LBS Full-Auto Rated Removable End-Cap Proudly Made in U.S.A.