Would you trust a complete upper and lower slapped together?

[bamashooter]

I trust my "assemblies". But I don't consider them "slapped together".

[SouthwestAviator]

The upper to lower fit of my BCM is actually on par with all of the factory rifles I've purchased. Good point about the military using different assemblies with no problems.

[FromMyColdDeadHand]

But lets be honest, who here really has a 'complete factory gun' after owning an AR for more than a week?

New stocks, triggers, sights, buffer system, BCG, muzzle device, safety, rails, etc, etc, etc.

I think I have only 1 complete 'rifle', everything else is lowers and uppers. I might get a little concerned if you have an upper that is tweaked- like a JP upper with adjustable gas that was tuned on a specific lower with a capture spring set-up.

[Watrdawg]

I don't think I have 1 completely stock rifle in the whole bunch of them. The closest is my LMT MWS but that has a Geissele SD-C trigger in it now. Other than that all others are uppers and lowers that I've put together on my own. Not worried one bit about any of them.