It's really an honor to join here. I'm Samuel Cruz and I'm new here. I was thinking to buy a new AR rifle for hunting purpose and I'm little bit confused to buy which one? I've two choices AR-10 and AR-15 caliber! My friend Mike told me to buy 6.5 Grendel AR15 upper with Barnes 120 gr TTSX. So guys can you suggest me the best? Also suggest me a better marketplace like I've purchased from moriartiarmaments.com last and I've experienced a really good service. So, Please help me guys!