Midwest industries upper height gas block - Midwest Industries Upper Height Gas Block With Machined Rail For .750 Diameter Barrels MCTAR-UHGB

This is a fantastic gas block, the perfect solution for an AR15/AR10 rifle with Delta ring and end plate combination. this type gas block allows for various types of flip sights to be mounted just forward of the hand guard, and it matches the the height of the picatinny rails on most AR Receivers. some have complained it might be a bit on the heavy side and suggested having it made of aluminum. in all honesty aluminum is a very poor material for a gas block. super hot gas pass from the barrel journal and into the gas block this will cause the aluminum to overheat and start eroding metal into the system causing premature failure down the road. i have looked intensely to find a Quality pic rail gas block combo. most i have found were made in China using aluminum. i'm pretty sure this one by Midwest Industries is the best one to get. i have been building AR15, M4, and M16A2 variants since the early eighties, I would not steer you wrong.