This is the description of the receiver directly as they come from CMMG:20" MedCon upper. Upper receivers are "T" marked and include extended feed ramp cuts. Features include medium contour barrel, 11 degree recessed target crown, chrome lined 5.56mm chamber and bore, 1/7 twist, parkerizing under “F” marked forged front sight base and magnetic particle testing on every barrel. When ordering with optional gas block, barrels will not be drilled for taper pins. Barrel is marked CMMG MPC 5.56 NATO 1/7.
I set this up as my replica M16A4 variant that the USMC is presently using. I added a NIB Knights Armament M5 RAS system which will stay on the rifle if you choose. It comes complete with 4 11-rib panels and the forward grip. Shown on the rifle is the Tangodown which I traded for the original Knights model. They're a better (beefier) all around grip. You can go without this setup for $200 less.
I have exactly 300 rounds through it (not a BS round count because it was exactly 1 South African battle pack) so it's not even completely broken in yet and it functioned FLAWLESSLY. CMMG did a really good job on this build! Take the worry out of an untried unit and also eliminate the wait time to receive one!!!
Comes complete with the upper shown less rail covers and bolt carrier group for $620 delivered CONUS via UPS or USPS. Your choice. Paypal +4% or MO.
IM ONLY as I don't presently have access to my email.