Originally Posted by mjkeat
Are you talking about things like making sure the gas key and castle nut is staked properly?
Just making it more reliable. Spring kit extractor ext. I'm new to ar's well I have always wonted one just never looked into them I just got mine the other day. 1/2 the stuff I see on hear I don't even know what they are talking about yet. But I know if shtf I don't won't my ar giving me problems and it can take some punishment if needed.