AR to build or buy

[MachIVshooter]

Build it.

Don't worry about the lack of a warranty. I've built enough ARs that I am NOT concerned if it doesn't run right. Why? I know the platform backwards and forwards now, and can fix any AR. If a part is "unfixable," I'd just buy another part. Most 'builders' lean towards high quality parts, so building a non-working AR is not very common. In fact, builds usually work better than factory built guns. I'd put my builds up against any professionally assembled AR.

Agreed. Unless you get a truly oddball or flat out crap part, they're all made to certain specifications, and will work together so long as you combine the right bits (quality will be irrelevant if you try to use a rifle buffer in a carbine receiver extension or somesuch)

I've put rifles together with parts from as many as 9 manufacturers (in one gun), no issues. The only two that ever had problems were:

-A friend's rifle that short stroked every time, the result of an undersized gas port in his replacement barrel, which was easily corrected with a hand drill, and the rifle runs 100% now.

-The first one we built for my wife. Built it during a crunch, grabbed the first stock kit we could get our hands on. The RE was too shallow internally.

Every other has run great, used parts from DSA, PSA, Bulldog, BCM, Armalite, CMMG, RGuns, Delton, Spikes, Ares, DPMS, UTG, WMD, Daniel Defense. I'm sure I'm forgetting a couple.