PSA has their PA15 with 16'' 5.56 4150CMV nitrided mid-length barrel, MLOK rail, EPT trigger, & Magpul MBUS II sights/stock/grip/trigger guard for $599/ea shipped currently here: https://flyingrich.com/m
This build was sponsored by IG:@invaderZip_ & IG:ZavairFirearms AKA http://22mods4all.com
Here is the lower to complete your AR-10!
PSA BLEM PA-10 Gen 3 Stripped Lower Receiver | Palmetto State Armory https://flyingrich.com/13