OP
1. get this upper
https://www.gunbroker.com/item/826129186
2. take another 30 seconds to add the BCG, charging handle and an A2 lower (those are a lot more readily available).
3. Enjoy!
The one trivial note I'd add about CAPCO uppers are a bit different hue than the deep black anodization of typical ARs - its a bit closer to the old Colt grey, but with very slight blue/green tint. Hardly notice the difference though. Regardless, these uppers are real GI ... USAF ordered a bunch to upgrade their M16A1s, the rest went surplus. If this guy has the same that I bought, you'll be pleasantly surprised to receive a mint A2 upper, sealed in plastic.
A2 lowers are plentiful - Stag, Fulton Armory, Rock River Arms, etc... RRA's are even on sale now, so a $430 CAPCO upper with complete $189 RRA Aw lower, plus BCG and charging handle - I'd argue you'd get a superior A2 rifle to Bushmasters current offer, for equal or less money. Or you could find a pricer "name brand" complete lower if the logo is a factor.
Bushmasters have had great years, and they have had bad years, in terms of quality and consistency of their rifles. I just don't know how the current "new" Bushmaster compares with the old Maine era Bushmasters I have had. They say the original Bushmaster team started up Windham Weaponry, and that might be an alternative if you just want a rifle out of the box.
I've had a couple of Bushmaster 20" rifles over the years, picked them both up in the latter part of the 1990s.
- One XM15ES2 had an upper that was nothing but trouble - just a lemon out of the factory. Ended up replacing that with a AWB-era neutered upper. Circa 1996. It now sports a CAPCO A2 upper.
- The second was very good, and still have it (though now swapped in a A4 style HBAR upper) - Circa 2001.
- The third was their M4 style Patrolman - circa 2008. Fantastic rifle.
I still can't believe the good ol' A2 is "retro" now. I guess I've finally become old and retro myself.