Black River Tactical
BRT OPTIMUM Hammer Forged Chrome Lined Barrels - 11.5", 12.5", 14.5", 16"
BRT EZTUNE Preset Gas Tubes - PISTOL, CAR, MID, RIFLE
BRT Bolt Carrier Groups M4A1, M16 CHROME
BRT Covert Comps 5.56, 6X, 7.62
Clint, there is a pretty good chance I'll be replacing this block with one of yours eventually but I either hadn't found them or they were out of stock when I was scrounging for parts earlier this month. In the mean time I hope to learn something about gas levels from the use of an adjustable block.
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