[Fick]

If your range will allow it or you have the room, this would be bad ass.

http://www.bloomautomatic.com/index_files/Page457.htm

 

[Turbozag]

Might be fun, but I wouldn't put one on an expensive gun. Set screws will scratch the **** out of the finish...

 

[Fick]

Through one right on a cheap Yugo SKS. They have the grenade launcher already to go.