Great accuracy - Aero Precision M4E1 Threaded 14.5in 5.56 Mid-Length w/ ATLAS S-ONE Handguard Complete Upper Receiver with Flash Hider

Bought the 14.5" and mated it to a Geissele Super-Duty lower. Fit is great, no slop or gap. Shot about 3/4" MOA CTC with 75 gr HPBT. Gassing feels correct, cycled a standard full-auto bolt with a H buffer perfectly. Hand guard is as slim as it gets but still plenty ergonomic, and super light. Would definitely buy again.