I put this in  Rifles, Uppers, Lowers, Barrels, and more but this time of night  not much traffic
I want to maybe grab a barrel tomorrow but if it won't fit I do not want to waste a trip

its late and you nothing to do so could you help a brother out

I just got a AAC can and after 4 months of waiting on paperwork the f-ing thing will not fit any of my RRAs
It will fit a colt so I borrowed a upper so i can try the darn thing out
the adaptor goes over the barrel about a inch
colts are .690 RRA is .720
I prefer bushmaster barrels for the $$
and will probably pick up a BM if it will fit
thanks for your time I appeciate it