You know that Ralph Merrill also sells .45 and .22 conversion kits for his Uzis? On the ATF forms they are listed as 9mm/.45/.22 caliber. The kits just drop in. I belive there is an aftermarket insert for the lower which will allow the use of grease gun mags.
In a few years when the dust finally clears and people start counting their change there is a pretty good chance that President Obama may become known as The Great Absquatulator
. You heard it first here on TFL.