Does the job, but beware of dimensions - Moriarti AR-10/LR-10 Complete Billet Upper Receiver

Does it fit on a regular AR10 lower? Yes, BUT… this receiver is very girthy and does not sit flush with your regular AR10 lower, such as my Aero M5. It had so much unneeded mass and has excess standing out and seems to be a proprietary item and is specifically meant for a Moriarti lower. Will still function, but does look natural on non-Moriarti lowers.

Can’t say I would necessarily recommend this upper, but at the end of the day it will work on your DPMS style lowers.