[k0zplay]

Hey everyone, I've recently encountered a problem with my Marushin Glock 21. The "valve knocker" (shown in attached picture highlighted in red, the piece that strikes the magazine to release the gas) seems to have snapped. I currently do not have the gun diagram and cannot find the part number for it. I also can't find the replacement piece on the internet anywhere, Redwolfairsoft said they could probably order the part for me, but they need the part number.

Does anyone have the diagram for this gun? or know the part number. Thanks in advance guys.