Trigger metal contact broke.
 

When i got my gun, one of the contacts wasn't really soldered very well, but i thought it'd be okay. A couple days ago when i was trying to get my gearbox back into the handle, the solder broke. I thought it'd be easy resoldering it, but when i put it back together, i guess the contact got caught on the carpet, and broke off. What parts do i need? Its the small metal contact connected to the trigger.