The BCM Low Profile Gas Block, like with all BCM parts, is manufactured to the highest quality standards. This gas block meets and exceeds the Military specification required by the technical data package. If you are building a firearm and you need parts that you can rely on, you should be installing genuine BCM parts and accessories.
Features and Specifications:
Manufacturer Number: BCM-LGB-750
Manufactured within tight Mil-Spec tolerances on all Inside diameters
Barrel inner diameter honed after finish per USGI TDP
Set Screw Mounting
Set Screws 10-32x 3/16 Knurled Cup Point
AR-15, M16, M4, M4A1 Barrel with a .750″ Barrel/Gas Seat