The Guntec USA 1326-MB-P-S-BLUE Micro Slip Over Barrel Shroud with Multi Port Muzzle Brake is engineered for exceptional performance and unmatched style on AR pistols. Constructed from durable T6 aluminum and accented with an eye-catching anodized blue finish, this lightweight accessory optimizes both effectiveness and visual appeal. US Made T6 Aluminum New Micro Design Total Weight: 3.2 oz Length: 3 Compatible with 9mm (1/2 x 28 Thread) Threads start 1.25 down the shroud Functions as a barrel shroud and muzzle compensator Multi Porting "Gatling Gun" style reduces felt recoil up to 70% Covers 1 5/8 of the barrel Inner Diameter: 0.5 Caliber: 5.56 Outer Diameter: 1.1875 Designed for AR Pistols Elevate your shooting precision with the Guntec USA Micro Slip Over Barrel Shroud, designed to enhance both comfort and accuracy.