I need... errr want a new AR for my thermal coyote hunting . Want a harder hitting cartridge than 223. Im not a reloader so need factory options and I have a surpresser. Was thinking 6.5 grendel was the best fit ? My question is - should I go pistol or full lenght ? My AR im using now is heavy and feels 5 foot long with that surpressor on it with a 16 inch barrel , however , Id like something that shoots relatively flat to 150-200 yards. Lighter the better ! Maybe Im asking too much lol . Any full built 14 inch 6.5 uppers ? My heads spinning . Need some opinions !!