I found a Rock River fully assembled lower with a Rock River two stage trigger & 6 position stock for a decent price (considering all the anti-Obama-crazed pricing) @ the show. Mated it to a Rock River 458 SOCOM 16" flat top upper.
I installed my Bushnell Holographic sight & took it out to the range tonight. It makes BIG F'ING HOLES!!! I need to find a cheaper non-hollow point round. I had a couple FTF. My shoulder is a little sore too. 8)
I'll link the rest of the pics...
.223 vs. .458
http://gallery.indystars.org/d/104397-1/458SOCOM_sm+002.jpg
Fits a standard AR15 mag & feeds through a standard AR15 lower.
http://gallery.indystars.org/d/104401-1/458SOCOM_sm+003.jpg
http://gallery.indystars.org/d/104405-1/458SOCOM_sm+006.jpg
Reminds me of the Monty Python "Bruce" sketch.