By the photo ( the mag), I guess this is a Uzi pistol, 2X years ago model (1987), same as year of Maruzen KG9 release.
As I remember, I have one before,
- full auto only, really fast "水柱" to clear one mag, but after all BB in Mag is fire out if you keep pulling Trigger the gas will keep spurting .
- gas tube connect with a 'F' type metal connector('12' gas bottle+ 1 empty gas bottle), of couse you can use '22' gas.
- Full Plastic body, less metal parts(selecter, mag catah....)
- 3 types of spring mag. 22rd or 33rd or 60rd ( My one is make by 'brown' clear plastic can see the BB inside)
P.S. KG9 is better, coz it is single shoot on 1987