@Tndeerhunter82 - something which may not be obvious for a new shooter: The 6.5 Creedmoor and 308win only fit into a large frame AR-10, and do not fit into an AR-15. The 6.5 Grendel and 6.8 SPC fit into the small frame AR-15. The jump from a 15 to a 10 is a fairly significant increase in weight, but also in cost. I have generally told folks to plan on $1000 to build a proper quality AR-15, effectively double that for an AR-10. There is also far more variability in propriety in AR-10/LFAR’s, such building and rebuilding them takes far greater understanding of parts and brand compatibility than AR-15’s. I don’t say this to discourage you from buying/building an AR-10/LFAR, but only to shine a light on these 3 significant differences between building 15’s and 10’s.