SureFire PROCOMP556 Muzzle Brake, Black Nitride Steel, 1/2"-28 Threads, 2.50" OAL for 5.56x45mm NATO M16/M4

The SureFire PROCOMP556 muzzle brake is purpose-built for AR-15, M16, and M4 rifles chambered in 5.56x45mm NATO, delivering measurable recoil reduction and faster shot-to-shot recovery on the range or in the field. With its offset porting design and SureFire's proprietary Impulse Diffusion geometry, this 1/2"-28 threaded brake minimizes both recoil impulse and muzzle rise, helping your rifle track straight back on target so you stay in the fight longer. Whether you're running drills at an outlaw 3-gun match, stretching shots at distance, or just tightening your group work at the range, the ProComp 556 is engineered to keep your sights where they need to be.

Built from U.S. mill-certified steel and finished in black nitride coating, this brake is designed to handle the abuse of serious use without flinching. The precision-machined construction and high-precision barrel threads ensure a rock-solid interface with your rifle's muzzle, and the 2.50" overall length keeps the package balanced without excessive extension. Best of all, installation requires no permanent modifications to your rifle—swap it in and out as needed.

SureFire included a tuning feature most shooters overlook: a blind pilot hole at the 9 o'clock position lets you fine-tune the brake's recoil characteristics to match your specific shooting style or ammunition. A basic hand drill and the right bits are all you need to customize it. There's also a 6 o'clock pilot hole for shooters who plan to pin and weld their brake. Note that the ProComp 556 is a standalone muzzle device and does not function as a mount or adapter for SureFire Fast-Attach suppressors.

Key Features

• Offset porting reduces recoil impulse and muzzle rise for faster follow-up shots
• Proprietary Impulse Diffusion design minimizes side blast and rear-directed concussion
• Precision-machined from U.S. mill-certified steel for durability and reliability
• Black nitride coating resists corrosion and environmental wear
• Tunable via blind pilot holes at 9 and 6 o'clock positions
• No permanent modifications required for installation on AR-15/M4/M16 platforms
• Designed and manufactured in the U.S.A.

Specifications

Frequently Asked Questions

Will the SureFire PROCOMP556 fit my AR-15 or M4?

Yes, as long as your rifle has 1/2"-28 muzzle threads, which is the standard for 5.56x45mm NATO AR platforms. Installation requires no permanent modifications.

Can I use this brake with a SureFire suppressor?

No. The ProComp 556 is a standalone muzzle device and does not serve as a mount or adapter for SureFire Fast-Attach sound suppressors.

What is the pilot hole tuning feature?

SureFire included blind pilot holes at the 9 and 6 o'clock positions to let you customize the brake's recoil character. Using a basic hand drill and appropriate bits, you can fine-tune how the brake performs with your specific shooting style or ammunition. The 6 o'clock hole also accommodates pin-and-weld installations if you plan to permanently attach the brake.

How effective is the recoil reduction?

The offset porting design and Impulse Diffusion geometry are engineered to reduce both recoil impulse and muzzle rise, keeping your rifle on target for faster follow-up shots. The tunable design lets you dial in performance for your exact setup and ammunition.