Aero Precision M4E1 Threaded 16" Complete Upper Receiver w/ ATLAS S-ONE Handguard
Aero Precision M4E1 threaded complete upper built around a 16" barrel and an ATLAS S-ONE free-float M-LOK handguard. The M4E1 upper uses an enhanced forging profile with M4 feedramps, laser-engraved T-marks, .250 takedown pin holes, and includes an ejection port cover (installed); slick-side upper with no forward assist.
The ATLAS S-ONE handguard features a continuous/full-length Picatinny top rail and integrated QD sling sockets at the 3, 6, and 9 o'clock positions. This upper features a threaded muzzle (thread pitch not verified).