Yeah they make pretty much everything with an AR platform even .45acp and .50 bmg bolt action uppers. I happen to be an AR fan and I think the versatile platform is what makes it attractive. I love my Camaro (Chevy fan overall though) when it comes to cars and I love AR when it comes to guns. But don’t get me wrong I’m open to owning an AK one day too.:D
I just bought a Power Parts Kit from Gearhog (see below) and am watching for a good deal on an 80% lower. Likely going to go with a polymer lower since I have been told it is exponentially easier to machine the polymer lower vice the metal lower. Will need to but a buffer tube, spring and buffer also. No rush though.