SRX BRAKE 1/2-28 INCLUDES SHIM KITYankee Hill Machine Company 5.56/.223 SRX Muzzle Brake 5.56 x 45mm - BlackSKU: YHM-4401-MB-28$99.95PriceQuantity*Add to CartSpecifications Manufacturer model: YHM-4401-MB-28 UPC: 841812101505 Type: Accessory-Muzzle Brakes Caliber / gauge: 5.56 x 45mm Overall length: 7.1 Finish: Black Feature 2: Includes Shim Kit