It has two Skeleton section, the first is Heavy Duty structure for Withstand Gas Impact and the second is more bigger Skeleton.
Best Muzzle Brakes and Compensators - DB TAC
223/5.56 1/2 X 28 TPI AR-15 LINEAR COMP KNURLED FLUTED CAN
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Muzzle Brake, Call of Duty Wiki
US Compact Skeleton Low Concussion Muzzle Brake Compensator 1/2x28
Tan Skeleton 1/2x28 TPI Fit 22 223 556 Low Concussion Muzzle Brake
1 2 28 COMPENSATOR 22
California Compliant Products
AR – TACDOM
Aluminum Red Slant Port Low Concussion Muzzle Brake Compensator 1/2x36 for 9mm
AR-10/LR-308 Flash Can Muzzle Brake - Aluminum - Anodized Gold
3108 - NBS .223/5.56 1/2-28 TPI Three Port Muzzle Brake - Black
6 Best .308 Muzzle Brakes & Compensators [Tested+Video] - Pew Pew