It has two Skeleton section, the first is Heavy Duty structure for Withstand Gas Impact and the second is more bigger Skeleton.
RIFLE PARTS 223
NEW! Compact Low Concussion 1/2x28 Muzzle Brake Compensator for
A&A All Steel Low Concussion 1/2x28 Compact Muzzle Brake
5.56 / .223 TPI Compact Muzzle Brake for 1/2x28 - ACME Machine
3108 - NBS .223/5.56 1/2-28 TPI Three Port Muzzle Brake - Black
DB TAC Red Color Aluminum Skeleton Muzzle Brake Compensator 1/2
Low Concussion Linear Compensator Muzzle Brake 1/2x28TPI .223 or 5
A&A All Steel Low Concussion 1/2x28 Compact Muzzle Brake
AR-15/.223/5.56-Booster-Flash-Hider-1-2x28-Thread-Pitch-Stainless
RED ANODIZED 6082 T6 Low Concussion Tanker Muzzle Brake 1/2x28 TPI For 223 556 $29.99 - PicClick
9mm Muzzle Devices, Build a 9mm AR
DB TAC Red Color Aluminum Skeleton Muzzle Brake Compensator 1/2
Black Skeleton Low Concussion Muzzle Brake Compensator 1/2x28