BWE Firearms has worked very hard to produce a 22LR Uzi magazine that actually works with all most all of the 22LR SMG conversion kits. We start as surplus 9mm magazines that we re-parkerize then fit with custom inserts. We then machine the inserts in house out of an Acetal polymer and fit them to the magazine bodies. New 22LR followers and springs are installed and you have a beautiful magazine that runs like a champ.
These magazines do NOT fit the Umarex Walther 22 Uzi.