As far as I can tell the Stg is now out of production. I was looking for one for a friend and found CDNN has some. Also they have a $19.95 scope mount which replaces the rear sight. It’s a picatinny rail so it’s not exactly authentic, but should be useful if you just want more accuracy. Also German Sport Guns has produced a short ten round magazine which is useful for replacing the standard 25 shot one if you want to shoot the rifle off of the bench or in prone. The 25 rd one’s are full issue size and really clumsy except in offhand or if you take a rest on your Koenigs Tiger. Gun Magazine Warehouse has the Short 10 rd mag for $32 and the 25 shot ones for $19.95.