This is a 16" Bushmaster upper with A1 sights and a pinned Mini Y Comp. It has carbine handguards. The barrel is marked "B MP 5.56 NATO 1/9 HBAR".
The round count is less than 350rds.
It has a couple of minor handling marks on it but nothing significant. One is a mark on the right side in front of the charging handle.
No bolt, bolt carrier, or charging handle.
I will take $250 with shipping. I will take Paypal (1.5% extra) or money order.
Pictures are available.