Had multiple RRA, and have built their basic uppers out for several shooting friends - all had been easy to work on, fit standard parts with out issue, and been decently accurate - MOA of intended use. I’ve ran mine through a couple of 500-1k carbine classes, no issues.
Investment is good for the return.
BCM is solid for hard use - carbine classes, weekend pick-up matches, club use, and rentals. They have a ton of “pro” sponsorship - but so does NASCAR… doesn’t make them “the best”, it’s a decent bet that what you get will out last you - they are durable.
Higher initial investment - may be more than you need for a truck gun.
DD - no issues with the ones I’ve handled and shot - price point higher, and I don’t see any noticeable increase in accuracy or durability over BCM. IMHO - you’re starting to get into boutique ARs at their price point, and more name than added game. Their handguards are solid for multiple uses, but again - pricey.
High initial investment - not gaining much over BCM for the added cash - IMHO.
YMMV