Science Fiction Movie/TV laser gun identification

[aliensarchive]

From last weeks 20th Century Props sale. Any ideas?

 

[Funky]

I can't help but I can't get over how much it looks like something HR Giger would design!

 

[SSgt Burton]

I can't help but I can't get over how much it looks like something HR Giger would design!

First thing that popped in my mind too.

If the Xenos used weapons, they would look like this!

Kevin