CMMG ZEROED AR-15 .750″ Adjustable Gas Block
The CMMG ZEROED Adjustable Gas Block sets itself apart with a sacrificial cleanout chamber — a dedicated space where excess carbon can collect rather than foul the gas pathway. That means the block stays user-serviceable without a full teardown, and your gas system keeps running cleanly over the long haul. A 20-position detent adjustment screw lets you fine-tune gas flow for suppressed or unsuppressed shooting, while a gas nitrided finish over 4140 steel delivers corrosion resistance that goes well beyond standard phosphate coatings.
- Gas Block Diameter: .750″
- Material: 4140 Steel / 17-4 Stainless
- Finish: Gas Nitride
- Adjustment: 20-position detent screw
- Cleanout Chamber: Sacrificial, user-serviceable
- Type: Set Screw, Low Profile
- SKU: CMMG55DA31F
What’s Included:
- (1) Gas Block
- (1) 6″ 3/32″ Hex Wrench
- (1) Roll Pin
Compatible Platforms: AR-15 and AR-style rifles with .750″ barrel diameter
Comparing nitride-finished .750″ adjustable blocks? See the KAK Industry .750″ Adjustable Gas Block, or browse the full lineup of Adjustable Gas Blocks.
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