MR-B gun

Does anyone think they can make a well working replica for this gun made out of K'Nex? 

I myself could probably make this, but due to a recent fire, I'm low on K'Nex, so I'd like to know if anybody is capable of doing that.

This was the only picture I was able to find so sorry if it's a bit unclear.

Picture of MR-B gun
looks like a suped up p90
Looks like junk. Pick another one.
super late reply