This AR10 A4 Upper Receiver has the forward assist mechanism installed but does not have an ejection door. This one has a few scratches from being in the trunk but has never been used. The stripped version sells for $250 new but since this has the forward assist installed you are getting a great deal at $225.
I would consider trading any of the following (+/- cash depending)
Magpul UBR or ACS
Troy BattleRail TRX-308 13.8"
MBUS Back/Front Sights
US only, Paypal (price includes fees), will ship priority/insured/delivery confirmation. Email (email@example.com) or call (678-524-9453) with questions.