BRT MicroPin Gas Block™
The Black River Tactical MicroPin Gas Block is designed to fit under most available free float rails and fits all AR15/M4 barrels with a .750" nominal diameter gas block journal.
Pinning of the gas block is a must for professional end users who demand the ultimate reliability from their carbines.
The Black River Tactical MicroPin Gas Block is designed to be easily pinned to the barrel in addition to set screw mounting, for a maintenance free, reliable solution.
It features a flat, center spotted face that allows for easy drilling and installation of the coil pin.
To install, just secure the assembled barrel and gas block in a drill press vice and drill through, using the center spot as a guide.
The block may also be used with solid dowel pins and taper pins.
All bores are machined to very tight Mil-Spec tolerances to ensure precise fits on both the barrel journal and gas tube.
This maximizes gas flow and allows top gas system performance.
Weighs only 1.5 oz
Fits barrels with a .750" nominal diameter gas block journal
Low Profile Gas Block
Download the BRT MicroPin Gas Block Install Instructions (pdf)
10.5″ M4 Profile,.750 Gas Block Area,.085 Gas Port Size, Carbine Gas System
18″ SOCOM Profile, .750 Gas Block Area, .080 Gas Port Size, Mid-Length Gas System