So I just ordered in a barreled uppper reciever for my Palmetto State lower my son gave me. Total newbie to the world of AR's here. My first question is, if I choose to hunt deer with this, and want to try a different caliber besides .223, what calibers can I get and still use this lower without modifying? I'm wondering about 6.5 Grendel? I'd just purchase another complete upper as long as I could drop it on to this receiver.
Thanks guys.
Last edited by gophergunner; 04/14/16.
