[Snowgun]

Yep, the same thing happened to me. A small cylinder yellowish piece came out and I was thinking WTF is that. Two minutes later, I realized a small spring had popped halfway out, and was bent out of shape. Now that black part thingy that attaches to the bolt itself is useless for me as well. But luckily I had a spare.

If you figure out where to get one, I would love to have another in case it happens again. Hopefully it wont though.

Here is a link to a website I've found
L96 / MK96 Airsoft Sniper Bolt Handle Base Spring & Pin Part
$1.50