I am starting a uzi carbine build using a the McKay Uzi Semi Auto fully welded receiver and McKay UZI type semi-auto bolt assembly (Both available at http://store.mckay-ent.com) With a IMI UZI Completion Kit for McKay designed for use with these products. (http://www.robertrtg.com/nodakuzi.html) And a new 16inch barrel. No welding or hard gun smithing is supposedly needed. Mckay made the nodak uzi receiver. Nodak no longer sells it, so McKay is selling the uzi parts direct now. I will start posting how it goes when the final parts get here this week.