I've been contemplating building a 45 caliber carbine that uses the 30 round KRISS mags but ISNT the KRISS Super-V. I just dont like the feel of the gun, I'd rather an AR-15 style chambered in a 45acp or 460 Rowland. I only have a little experince with AR-15s and I'm not a fan of the .223 and 5.56 Nato, but the platform's feel is outstanding, so I figure I'm going to need a little help with this project. Here's my wants on this poject: Has to use Glock 21 magazines (thus the 30-Round KRISS mags) Have a decent trigger pull (preferably not Glock style squishy but i can deal with it if I have to). NO Direct Impengment gas system (Piston or Blowback was what I was thinking) I'd like the capability for 460 Rowland but its not a deal breaker. ------- My purpose for the gun is that it sounds fun and might double as a second SHTF gun. Mostly for fun though. So does anyone have ideas about how I might get this accomplished? I see that MGI's Hydra has a Glock 21 Magwell but I'm not sure of MGI's repuatation or the Hydra's for that matter. Any gripes or complaints?