Greetings from north Texas. I ordered a 14.5 pinned PSA complete upper with BCG and charging handle (CH). Unfortunately, the BCG and CH did not make the trip from South Carolina. It will go on my first lower build. My question is about the BCG. Will it just drop in and function properly in the upper PSA just sent me, or does the BCG need to be adjusted to the upper for proper head space? Will I need a gunsmith? Anyway, if not, I'll just wait for the parts and not make a big deal out of it with PSA customer service. Or, if there's a good chance I'll need to adjust the BCG, might I press PSA customer service to upgrade me to a full auto BCG and maybe a gunfighter CH for my trouble? Any insight and/or friendly advice would be appreciated.