Knight’s Armament 7.62 QDC Qual Open Port, 5/8×24 KAC PN 118899 This muzzle brake allows the use of Knight’s Armament 7.62 QDC suppressors on AR-10s and 5/8×24 threaded rifles. Specifications: Thread Size: 5/8×24 Click here to browse our entire selection of Muzzle Devices.
