Due to the Washington I-1639 passing I'm jumping on the bandwagon out of protest. First one is a kit (5.56) with an 80% lower. This is of course only the beginning of the rabbit hole.
I'm hoping for some suggestions for a good book to purchase and read on the subject.
Also looking for any advice specific to cast bullets in an AR. .223/5.56 or is there a better choice for my second one?