Uncommon in the states and considered the best gbb mp5. All six mags are leak free. Has npas installed so you can set the fps, currently set at 1.2j. The only "issue" is it was under hopping 0.32 last time I ran it so it will probably need a new bucking soon. It uses the standard we buckings. Please ask if you have questions. Only thing I am interested in is a mod24 or ghk mags