AAC MK13SD BRAKE 90T 7.62MM 1/2-28 – Precision Muzzle Brake for Suppressor Mounting

The AAC MK13SD BRAKE 90T is a precision-machined muzzle brake designed for 7.62mm/.308 caliber firearms with 1/2-28 TPI threading. This 90-tooth ratchet mount brake serves as both a functional recoil reduction device and a suppressor mounting interface for compatible AAC suppressors. The 90-tooth design provides precise indexing and timing for optimal suppressor alignment.

Machined from heat-treated steel with a durable finish, this brake is compatible with standard 1/2-28 threaded barrels commonly found on AR-15 platforms chambered in 300 Blackout and similar calibers using this thread pitch. Installation requires a crush washer or shim kit (not included) for proper timing and a standard armorer's wrench.

• Type: Muzzle brake / suppressor mount
• Caliber: 7.62mm/.308
• Thread Pitch: 1/2-28 TPI
• Mount System: 90-tooth ratchet
• Material: Heat-treated steel
• Compatibility: AAC 90T suppressor systems
• Installation: Requires timing shims or crush washer (sold separately)