Completed the Purgatory Challenge last weekend and really enjoyed it. I carried a DPMS .308 heavy barrel ( about killed me ) I am looking at going 6.5, I plan in selling the DPMS and going light. I have another .308(SIG 716) I have quite a few PMAG and would like to find a rifle chassis that I can use my PMAGs in . I know Magpul make stock, but who else does. any input would be great thanks.