Put this together from bits I had laying around.

so it works and shoots 340-350fps. ROF is wicked too.

the fire select has a bit of a mind of its own. Safety is fine but semi and full like to just decide which they wanna do and I don’t have time to fix it. The blowback bit could use a new spring, doesn’t return fully every time.
 

metal receiver barrel stock tube etc. Externals are solid, I think the easiest fix would be to buy an aps ebb gearbox and drop it in. Then keep the gears and bits as spares.

££90 posted

red dot and suppressor aren’t included. I’m also out of m4 mags.