The DPMS 308 rifles generally get good reviews. They will accept original AR 10 pattern mags (unlike the current Armalite AR10 that uses modified m14 mags). MagPul mags are compatible with these.
I may be biased, I have a long term project, being built on a CMMG lower that takes the DPMS type .308 uppers and AR10 mags. But mine will have custom upper/barrel and parts.
Is tis one a 20", 24", or 16" barreled gun?