Here you have a little guidance for the E-11 and DC-15 blaster with fully extended stock.
You need:super glue
cutter knife
wire (one with a diameter of 0,5mm and one with a diameter of 1mm)
paints: black and grey (for a drybrush)
and of course the weapons
production steps:1.) at first cut of the molded stock
2.)you need three wire pieces and the small plastic part from the molded stock
3.)glue the wire pieces on the weapon
4.)I also made a new sight with the thin wire
5.)at last paint the weapon and make a drybrush
I also made a YouTube video: