[ARW]

I think this is the upper…

https://www.aeroprecisionusa.com/m4e1-threaded-16in-556-mid-length-complete-upper-atlas-rone

[ARW]

Ok. Geeking out a little. That previous link was to an aero upper with the picatinny seamless between the handguard and upper reciver. So it’s not the right one. I think this is it…

https://www.aeroprecisionusa.com/ar15-complete-upper-w-no-forward-assist-16-5-56-mid-length-barrel-15-m-lok-atlas-r-one-handguard-anodized-black

A $500 upper is expensive when value ones can be had for $250 or less.