F Guntec USA AR-15 Micro Slip Over Barrel Shroud w/ Multi Port Muzzle Brake, Anodized Black, 1326-MB-P-S $39.36 1326MBPS show more like this Dvor F GunTec Muzzle Brake with Slip-Over Barrel Shroud AR-15 1/2-28 Thread 223 Remington, 5.56x45mm NATO, 9mm Luger Steel Matte - 707902" $39.99 1326-MB-P-S show more like this 5.00 MidwayUSA