Re: SASS OR REPR???
I have a dpms sass upper if that's what you're referring to. Other than the whole "we don't need to cut the feedramps right in this one" it works great, really heavy though. Accuracy is sub moa with 175+ handloads. If I were to buy right now (and didn't want to build my own) I would look at the POF 16, 20 and LMT.
Whatever you buy plan on handloading and use a good, heavy bullet like a 175 smk, 178 amax, 175 nosler, etc. I wasted a lot on 150 and 168 grainers, never got them to shoot. 175 smk, 178 amax, very accurate.