KWA MP9 body pin comes out after firing

[elrasho]

When firing my MP9 over a period of time, one of the body pins begins to pop out. One time it came right out! Any ideas why this is happening? I'm using Predator abbey 144a gas and it shoots at around 320 FPS. The body pin in question is the one further east back and it goes through the trigger arm in the gun.

[elrasho]

Re: KWA MP9 body pin comes out after firing

Looking at the blow up diagram I'm missing part 111 which is a c clip. Any ideas what size this is so I can get another one?

[elrasho]

Re: KWA MP9 body pin comes out after firing

E clip was missing from that pin, replaced it and now it's Ok.