- Product Code: 55DA31F
CMMG ZEROED Adjustable Gas Block .750 - an adjustable gas block for the AR15 system, allowing you to fine-tune the gas flow to match your ammunition and use the setup with a suppressor; this solution provides the freedom to adjust the operation to your exact preference. The .750 inch (19.05 mm) gas journal fits common AR-15 barrels, and the adjustment facilitates control over both over-gassing and under-gassing.
A key feature is the 20-position detent adjustment screw, with clear clicks that help you find the optimal setting without having too much or too little gas. The design is user-serviceable, and the so-called sacrificial cleanout chamber directs excess fouling to a location that can be cleaned. Included is a 152 mm (6") long 3/32" hex key (2.38 mm) for adjustment and a gas tube roll pin.
An exceptional feature is the precise click adjustment, which stays in place and does not require locking with additional screws. The sacrificial cleanout chamber improves carbon buildup management, making maintenance easier after long shooting sessions. Compatibility with the .750 inch (19.05 mm) gas journal standard ensures straightforward installation when the barrel has the correct gas journal and a standard gas tube.
CMMG ZEROED Adjustable Gas Block .750 - Features:
- Compatibility: AR-15 barrels with a .750" (19.05 mm) gas journal
- Adjustment: 20-position detent adjustment screw, clear clicks
- Serviceability: user-openable and cleanable
- Sacrificial cleanout chamber: directs fouling to a cleanable area
- Included: 152 mm (6") 3/32" (2.38 mm) hex key for adjustment
- Included: gas tube roll pin
- Purpose: fine-tuning the gas system for different ammunition and suppressor use
Summary: the adjustable gas block provides fine-tunable gas flow, reducing the stress caused by over-gassing and ensuring reliable cycling with various loads. The user-serviceable design and the chamber that facilitates cleaning support long service life and consistent performance.
Recommended Use: aimed at builders and shooters who want to optimize the AR-15 gas system's performance for different ammunition and setups, including suppressor use.
Product text updated on 9.3.2026.
