Help with kwa 1911a1 hop help

[joshcowin]

Hi there I was cleaning my barrel and the cloth was too big so I pushed it back and the rubber popped out and a piece sprung out.I don't know what the part is and how to put the hop rubber back in

 

[Mr.Millar]

Hi there I was cleaning my barrel and the cloth was too big so I pushed it back and the rubber popped out and a piece sprung out.I don't know what the part is and how to put the hop rubber back in

Click to shrink...

A little more info than that would be helpful, if you don't know which part has come out, how will we? Try to find an exploded picture of the gun and you should be able to work out which parts go where.

Failing that, post some pictures and I'll see what advice I can give.