I just did a similar build a few weeks ago for similar purposes (hog gun)... but I went the AR15 route rather than AR10.. and went 458 SOCOM (I can salvage the over .375 requirement for you! :D )...
Bear Creek upper
Drop in Rise Armament single stage, 3.0lb trigger
Vortex cantilever mount
Vortex strike eagle optic
458 SOCOM uses standard AR mags.. so nothing special there.. I did buy a couple of 458 SOCOM labeled/marked mags though just so I could have a few dedicated specifically to this rifle as opposed to grabbing mags out of my 556 stash..
I've got a high output green light made by sniper hog I will mount on it for night time use with the strike eagle.. or I am considering a Sightmark Wraith day/night vision optic for it as well...
Should be an absolute hammer on hogs out to about 150 yards (way more range than I need for the places I typically hunt them)..
Also built an almost identical rifle to the one described here at the same time.. but in .350 legend.. same basic parts/components.. although the 350 legend does require special magazines.. (and doesnt meet the above .375 requirement :D )..