New for 2014, The KWA Kz .61 Skorpion Gas blowback SMG replicates the popular vz. 61 Scorpion pdw, in airsoft gun form. Metal construction, fully blowsback, and takes both 20-round and 40-round KWA Skorpion magazines. Uses green gas. Comes with one 20-round magazine. Folding metal wire stock is solid and locks back. This is definitely the best Skorpion airsoft gun made (the Marui is nice too, but isn't all metal like this one).*note: when inserting magazine, be sure to pull the bolt back prior to inserting mag to prevent damage.