Im in process of building yet another ar, trying to pick up the remaining pieces, ( white oak 20" 1-7, young m16 NM cbcg, mega recievers, magpul prs, timney trigger so far )I saw the spikes t2 heavy buffer , was wondering if there is an advantage to this. also to run the carbine buffer you have to run a spacer in the rifle length tube, as this slows the extraction cycle will it increase accuracy?, no real recoil on an ar so that isnt an issue. trying to build this one right and have a good shooter out of the gate.