The RRA only has a 1.5 MOA guarantee in the accuracy department and the Armalite is a chromelined barrel so I doubt it'll do much. Ether. If you intend on doing this for a pig killer or deer rifle I recommend letting a company who specializes in this round gain your business.I have never owned a 6.8 but finally got the thumbs up from the wife. After poking around I believe I am going to get a 6.8. I have a ranch here in Texas and want something with enough power to drop deer and pigs. I am having trouble deciding between two rifles however. Armalite M-15 Light Tactical Carbine of Rock River Arms 6.8 X-1. What are your thoughts? Or do you recommend any others in that price range? I dont really want to go the route of building one yet as I am not familiar enough with how it works. Thank you for any input.