Based on Policy I am only allowed Colt, Bushmaster,or Armalite.
My primary gun is a Colt 6920. I want to build a second. My question is has anyone used the Bushmaster lowers for builds?, and are there any problems with the quality of just the lower? Are the rear receiver extension threads "standard"?
I will fill it with other parts, Colt, LMT or CMT.
Any opinions on quality of internal parts? Manufacturers you guys have used that are top shelf?
As far as an upper I want to wait for a BCM, if not LMT is at the top...
Thanks.
Jack

