This is our standard AR-15 Micro Gas Block. Designed with the minimum profile to fit under nearly any quad rail system, it snugly fits standard .875 diameter barrels.
Features:
Mil-Spec dimensions
.875 diameter
Hardened Steel construction
Non-reflective, Matte Black finish
Includes roll pin, 2 set screws and allen wrench
Note: Not designed for bull barrel mounts
Fits: AR .875" barrels