After much research and opinion gathering, I picked a DPMS, 20 inch, 1/9" , full floated and fluted top end. Also a DPMS AR 15 lower from another source.
The 60 grain Sierra really had me looking for a 1/9" twist or tighter. This left me with a choice between an AR and a CZ 527. So I went with the self-loader.
Now I'll need to see if I can get one MOA accuracy from it. One Question though...Does the flat-top AR require a special scope ring or will standard Weaver rings work ?
Al