I have a 20" Odin 6.5 grendel, Wilson 300HAM'R 18" & Faxon14.5" & 20" 5.56,10.5" 300Blk & a 18" 308. All shoot exelent sub moa. Check CMMG , they are 6ARC 224Valk & shoot sub moa & exelent price also. Availability for exactly what u want would be my choice from any of these 4. Faxon pencil beat...