That PRS is one heavy SOB! Id go with an M4 type stock or even an A1 or A2 style. Lightweight bbl and stick with plastic handguards with the ranges your are shooting at. Also Id stick with a standard BCG.
Thats a damn good price. Ive never dealt with Bud's but you can buy ArmaLite with confidence. Lifetime warranty with factory rifles. The Brunton Bump (case deflector) is to deflect the empty cases forward, so it shouldnt bother you if you shoot left hand.
My AR10T home build.