Hello all,
I am in the process of assembling my AR with a PK Firearms low profile gas block. Is there any way of knowing which end goes toward the receiver? Basically, there is a tunnel through the entire top of the block with the pin more towards one end than the other. Sorry for the newbie build question, but the search was of no help!
Thanks!
Look inside the GB and find the gas port hole. Line this up with the port in the barrel. MOST of the time the pin will be closest to the muzzle.