Help needed, 445 lens

So I was moving some of my lasers and one of them hit somewhere. I checked the laser if it works. It was ok. I noticed that when moving the lens i heard a noise. i took off the back of the lens and the back lens( smaller one ) is moving. Nothing is broken, neither cracked. Is there something wrong with it?
Now I lost the back lens somewhere in the house. OMG! I cant put everything back -_-

good luck finding something so small and nearly invisable- hope it was not a G-1!!
you can get an AixiZ 445 glass lens for ~$10 they ship stuff your way all the time-see you on LC--LEN

Sooo I found it, assembled the lens and have a line crossing the dot. The lens seems damaged. I might sell it as defective. Its not too bad. The laser has not lost the burning capability. its just a line there, like the LOCs

Rayfoss has cheapest lenses available:
www.rayfoss.com

$10 but two pieces, not one. Shipping is $4, so you might as well pick something else up, another pack of lenses or a sled or something.

Sorry to hear your lens has cracked. Try to take more care in the future.