They aren't getting it back because I don't know how to drop it. they should be more worried that I did pick it up. they can pick it up themselves anyway at the start of the next round.
The drop button is defaulted to \ IIRC
Anyways, about Killing Floor, I find it very fun. Getting close to getting support to level 3 (yay shotguns) and unlocked the ZED gun which is a pretty neat gun although kinda useless and hard to aim.
I got so close to beating KF on normal on a long round solo. The damn patriarch got me, he is a total pain in the ass solo, at least with multiplayer he splits his focus and spreads his attacks a tad more evenly among the squad.