Thanks, Prodago... there are many vets and active duty military who are members here but of course you don't have to be to join in.
I suspect your Bushmaster has a chrome lined barrel, which model is it? You're probably ok but turn on the fart fan when you steam up the place! I.E. shower... You want good ventilation to keep the moisture down.
The biggest issue with assembling an AR isn't so much getting the parts together right - it's getting the right parts together. You'll remember the quality of a gun long after you forget how much you paid for it.
US Army 1966-69, VFW Life Member, Retired Geek