I have a aero m4e1 with a rise 140 flat face single stage trigger, raptor charge handle,magpul bad lever stock and grip. Handguard was swapped for an aero brand slim handguard that lines up perfect with upper receiver, barrel Nut has never been taken off rifle is factory built besides the extras listed above. I also have one 30 and one 40 round mag. No sights asking 1000 obo need gone ASAP
