CMMG 55DA38D Low-Profile Gas Block Chrome Moly Steel .750

The CMMG 55DA38D Low-Profile Gas Block delivers reliable gas system operation with a streamlined profile that accommodates free-floating handguards. Chrome moly steel construction ensures consistent performance across thousands of rounds while maintaining the clean aesthetics modern shooters demand.

What Makes This Different

This low-profile design sits flush beneath most free-float rail systems, eliminating the bulky appearance of standard gas blocks. The precision-machined chrome moly steel construction provides superior corrosion resistance compared to standard carbon steel alternatives. Set screws secure the block to the barrel journal with 15 ft-lbs of torque, creating a gas-tight seal that maintains consistent cycling pressure.

Key Features

• Low-profile design clears free-floating handguards and rail systems
• Chrome moly steel construction resists corrosion and heat stress
• .750" inner diameter fits standard AR-15 barrel journals
• Dual set screw mounting system ensures secure barrel attachment
• Precision gas port alignment maintains optimal cycling pressure
• Matte black finish reduces glare and blends with most builds
• Compatible with standard AR-15 gas tubes and handguard systems

Field testing demonstrates consistent cycling across various ammunition weights and environmental conditions. The chrome moly construction maintains dimensional stability through rapid-fire sequences and temperature extremes. Competition shooters benefit from the reduced weight compared to adjustable gas blocks, while the low profile accommodates precision free-float barrels without interference.

Technical Specs

• Material: Chrome moly steel construction
• Bore diameter: .750 inches
• Profile: Low-profile design
• Mounting: Dual set screw system
• Finish: Matte black coating
• Compatibility: Standard AR-15 platforms
• Gas tube compatibility: Carbine, mid-length, rifle systems
• Manufacturer: CMMG Inc.

This gas block represents the intersection of reliability and aesthetics for serious AR-15 builds. The chrome moly construction and precision manufacturing ensure consistent performance while maintaining the clean lines modern shooters expect from premium components.