Holosun 407C X2 green dot optic with 2 MOA dot, RMR footprint, solar battery backup, shake awake, and 2-5 year battery life for $220 shipped currently here: https://flyingrich.com/6
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