Sons of Liberty Gun Works factory OEM low profile .875 Gas Block for Mil-Spec AR-15s. Each SOLGW AR-15 Low Profile Gas block is machined from 4140 steel and ships with knurled Head set screws designed to work with any dimpled AR barrel. The block is nitride-treated for corrosion- and wear resistance and is designed to provide long-lasting service on your fight-ready AR. Mfg: Sons Of Liberty Gun Works
