CMMG Zeroed Adjustable Gas Block .750" AR-15 Black

The CMMG Zeroed Adjustable Gas Block is a .750 inch gas block for AR-15 platform rifles, and it is also listed for the LR-308. It lets the shooter tune the gas system to a preferred load or to a suppressed setup, instead of relying on a fixed gas port.

The block uses a 20-position detent adjustment screw to set gas flow, and it is made of 4140 steel with a black nitride finish. It includes a sacrificial cleanout chamber intended to collect excess carbon, and the design is user serviceable for cleaning. Adjustment is made with the included 6 inch 3/32 hex wrench.

The package includes the gas block, a roll pin for the gas tube, and the 6 inch 3/32 hex wrench for adjustment.

• Fits: AR-15 and LR-308 .750" gas tube
• Adjustment: 20-position detent screw
• Material: 4140 Steel
• Finish: Nitride
• Color: Black
• Included: Roll pin, 6" 3/32 hex wrench
• Serviceable: User serviceable with sacrificial cleanout chamber