If you send your rifle to Long Rifles they can tig weld a straight handle on for around $100 bucks, their turn around is really quick too. That way you don't have to mess with fitting a new bolt.
I love my 2013 white raptor, the most fun truck I've ever driven. But for your purposes, their not the best on jeep trails because of their 90" width. Amazing what they will do in open high speed desert terrain though..
Spartan Rifles is building a sweet custom .308 AR10, I'm pretty sure he has some available with minimal wait. http://www.snipershide.com/shooting/snipers-hide-px-commercial-sales/222561-ar-10s-spartan-precision-rifles.html
The showline of the bedding looks really bad, not just the chipped gel coat. I'm wondering if he let it cure to long and the damage occurred trying to get the action out? Maybe the bedding compound was mixed with to much hardener?
Re: Dirt bikers..
Factory Connection did an awesome job on my last bikes suspension, definitely where my money would go. I second the chain and no chain lube (makes all the dust stick and eat chains), just wd40 to stop rust. Nice bike