SONICORE Rekkr OB is a direct-thread, over-barrel suppressor designed for high-volume use. Constructed from 6026-T9 aluminum and 303 stainless steel, finished with a black Mil-Spec hard-coat anodize. Features a modular design allowing the suppressor to shorten for compact size. Thicker walls, stainless steel core with gas-disrupting grooves, and integrated stainless steel muzzle brake help maintain tight alignment during use. Direct thread mounting with 1/2x28 threads. Barrel outer diameter max is .745 in. Weight 14.8 oz, length 8.37 inches, diameter 1.77 inches. Caliber compatibility: .223, 5.56 up to .224 diameter. Materials: 6026-T9 Aluminum, 303 Stainless Steel.