Hello everyone.  I am building a new upper and would like to mate a RRA tactical carry handle (?)to a Bushy barrel.  What bolt group should I use?  I am leaning toward the Bushy.  Any problems with mixing and matching these parts?  Is the RRA mil-spec?

Thanks in advance

MWoods
Michigan

Any manufacturer's bolt assy, should work, so long as the headspace is correct.  My own three pieces (Colt uppper, Olympic upper, Rock River upper)all have Colt or GI contract bolts.  The Colt came that way, the Olympic has a military contract surplus bolt assy, and the RR has a mil. contract Colt bolt.

The two mil contract bolts were bought used from a surplus supplier because they were $15 apiece, and the headspace measured out fine.  Remeber the bolt locks into the end of the barrel, not the upper, so as long as the hole in the upper, for thr bolt & carrier assy is the right size, anything will work [:D]