Missing stub on shell ejection door

[Muscleflex]

Hi all,
Can anyone please tell me what this thing is called that I'm pointing at on the photo?
It's the lock for the door that's supposed to cover the hop up (and the door for where the shells eject on the real rifle). I think I've snapped the little thing as it won't close now.

This is a Marui M4 S System

Would anyone know if I can get a replacement?

[Lee 303]

Re: Missing stub on shell ejection door

As a temp fix you can reverse the spring so that it holds the door shut and you just use your finger nail to pull it open when you want to adjust your hop-up

[Muscleflex]

Re: Missing stub on shell ejection door

Thanks - would you know what this thing is called? So I won't have to call it a 'thingy'?!

[MasterGouken]

Re: Missing stub on shell ejection door

Ejection port cover catch?