If its that big, with extra grip and brace, why only 3.9" barrel?
I get the idea of having extra 30rd stick as also extra grip, but seems like trigger guard needlessly interferes with it, and why not make front grip/mag holder function as grip same with or without mag? Should barrel be at least as long as bodywork under the barrel, and for such a tacticool piece shouldn't it be dialed in for silencer with threaded barrel?
Straight slide stock is OK, but one comment complains. Is sliding stock even infinately adjustable? Don't think so. Maybe a top or bottom folder would be better, with a dail-in stop so it quick deploys to your precise best angle.
Seems like whole concept might be better done as a kit that fits over an existing stand alone pistol.
Comment