This is a LBE Unlimited Gas Block known as the Low Profile, model ARLGB-P.
This is the LBE .750 Steel Nitride Finished Low Profile Gas Block with Pistol-Length Gas tube Installed. Gas tubes are made from 304SS Seamless Tubing. Made in the USA.
Features:
Fits AR-15
Low-Profile
Nitride Finish
Made in the USA