CMMG 55DA31F Zeroed Adjustable Gas Block .750" Nitride 4140 Steel

Take full control of your AR platform’s gas system with the CMMG ZEROED Adjustable Gas Block. Whether you're tuning for suppressed fire or tailoring performance to specific loads, this block delivers precision and consistency through a rugged, field-ready design.

Crafted from durable 4140 steel and finished in corrosion-resistant black nitride, this adjustable gas block offers 20 distinct settings via a detent-indexed screw—ensuring consistent metering without guesswork or drift. The integrated sacrificial cleanout chamber helps manage carbon buildup while remaining fully user-serviceable for long-term reliability. Designed for .750” barrels, it brings high-end tuning capability to any build or upgrade.

Specifications:

• Compatibility: .750” barrel diameter

• Material: 4140 steel

• Finish: Black nitride

• Adjustment: 20-position detent screw

• Included: 6" 3/32 hex wrench, gas tube roll pin

• Design: User-serviceable with cleanout chamber

Dial in your AR with confidence—get it at Battlehawk Armory!