M4 Flat Top Upper Receiver - (Raw)
- Machined from 7075 T6 Forgings
- Mil-Std 1913 Rail for mounting optics and accessories
- Machined for use with barrels that use an M4 barrel extension
- M4 Feedramps
- Made in the U.S.A
Add a plain or engraved port door + forward assist kit from the drop down menu. See reference "CHART A" tab above.