Trijicon American made TA31F 4x lightweight ACOG with dual illuminated (tritium & fiber optic) red 223/5.56 BDC reticle for $873/ea with code "MRGUNSNGEAR" here: https://flyingrich.com/e
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