Jun 11 2014
We now carry SLR Rifleworks Sentry 7 adjustable gas blocks. If you want the best, there is nothing better. This block works with standard gas tubes and features single tool click adjust gas metering, a Nexturn Swiss precision metering screw, titanium leaf spring detent mechanism and 100% lifetime guarantee. These blocks are available with the purchase of any Bison Armory barrel or upper.