Breek Arms 2BO-S Muzzle Brake | 9mm | 5/8x24

Breek Arms 2BO-S Muzzle Brake | 9mm | 5/8×24

The Breek Arms 2BO-S Muzzle Brake | 9mm | 5/8×24 is a compact, performance-driven muzzle device built for recoil reduction and enhanced control on AR-9 platforms and pistol caliber carbines. Engineered specifically for 9mm barrels threaded in 5/8×24, this brake delivers a reliable balance of function and size, ideal for shooters running short barrels or suppressor-ready builds.

The 2BO-S (Two-Port, Blast-Optimized – Short) design features dual side ports that direct gases laterally to mitigate muzzle rise and felt recoil. This results in noticeably improved stability and faster shot recovery, making it an excellent option for competitive PCC shooters, defensive setups, and training rifles alike. Its short overall length helps preserve a compact profile—especially valuable on SBRs or where barrel real estate is limited.

Machined from durable 4140 steel and finished in black nitride, the 2BO-S stands up to the harshest conditions with excellent corrosion resistance. Breek Arms has precision-cut this brake to maintain perfect bore alignment and ensure optimal performance during high-volume shooting. The short body also makes it a perfect match for those looking to minimize additional length at the muzzle.

While compact, the 2BO-S does not compromise on performance. Its ports are strategically angled to reduce rearward motion without creating an overly harsh blast to the sides, making it suitable for close-range training or team shooting environments. The flat face and sleek aesthetic match well with modern AR-9 builds, giving your firearm a clean, streamlined appearance.

Whether you’re refining your AR-9 for competition, recreation, or duty use, the Breek Arms 2BO-S Muzzle Brake provides tangible performance benefits in a rugged, low-profile design. It’s an ideal choice for shooters who want to reduce recoil and stay on target without adding unnecessary bulk.