Unique, all-steel gas blocks expand the versatility of your rifle by providing a variety of accessory rail and hand guard mounting options. Especially helpful in customizing short-barreled tactical rifles. Designed Specifically for AR15s with a barrel .750" O.D. at gas port.

Features :

• Machined from 17-4PH Stainless Steel
• Nitride Finish
• Low Profile
• ".750" O.D. at Gas Port,