Looking at building a new AR10 in 6.5CM. Likely using SLR receivers with their handguard. Any other recommendations for receivers? My biggest question is which barrel? Going to be a 16” probably in mid length or maybe rifle. I’m torn between going with a Craddock RTR or a Xcaliber…. Anyone have experience with either of those brands? I noticed Xcaliber has a 1moa guarantee with a headspaced bolt.