I have a Bushmaster flattop upper receiver with Bushmaster B/BC/CH and either a Bushmaster 20 inch barrel or a Bushmaster 14.5 inch barrel with perm attached flashhider (the 14.5 inch barrel came on the upper straight from Bushmaster, both barrels have less then 200 rounds on them). Both barrels are chrome lined 1/9 twist. The 20 inch barrel is heavy and the 14.5 inch barrel is M4 profile.
I will include a brand new Arms #40.
I am looking for a complete Olympic Arms 9mm upper.