Shop › LANTAC 223/556 DRAGON MB/QD GEMTECH LANTAC 223/556 DRAGON MB/QD GEMTECH $128.99 LanTac USA LLC .223/556 Dragon Muzzle Brake W/Quick Detach GemTech Mount, Hardened Milspec Steel, Nitride, AR Rifles, 1/2X28 DGN556B-QM Quantity: Add To Cart Added! LanTac USA LLC .223/556 Dragon Muzzle Brake W/Quick Detach GemTech Mount, Hardened Milspec Steel, Nitride, AR Rifles, 1/2X28 DGN556B-QM