DESTINY 2 IKELOS HAND CANON

All new model with some tight tolerances. You'll need some two core wire, a couple of cable ties and pins for the trigger, winglets, and breach pin. Add a small spring to the trigger and a tiny bit of compressible foam to the breach pin socket (See Photo). 

Only instructions are:

1. Don't  glue the chamber, let it rotate on the pin (Photo 2)
2. Insert the trigger spring and trigger before fitting the grip (Photo 3)
3. Build the barrel, breach, chamber pin and chamber as a complete unit before fitting it into the frame
4. Pack a small bit of foam into the breach pin socket to push the pin against the chamber (Photo4)

Check the photos to understand the process