The Firing Line Forums - View Single Post - Is AR-15 reliability more dependent on the upper or the lower?

HorseSoldier · February 11, 2011, 01:18 PM

The upper is where most of the magic happens. From what I've seen, it's also the place where the home-builder has a lot more opportunities to make a mess of things. As for the OP, putting a good upper on a home built lower is a pretty good strategy. People have already posted some potential problem areas on the lower, all of which are pretty easy to catch if you're doing it wrong.

February 11, 2011, 01:18 PM	#11
HorseSoldier Senior Member Join Date: February 27, 2006 Location: OCONUS 61°13′06″N 149°53′57″W Posts: 2,282	The upper is where most of the magic happens. From what I've seen, it's also the place where the home-builder has a lot more opportunities to make a mess of things. As for the OP, putting a good upper on a home built lower is a pretty good strategy. People have already posted some potential problem areas on the lower, all of which are pretty easy to catch if you're doing it wrong.