Voted for M. Main reason is that M's gun looks more like the actual model. A few things about Jklaroe's gun:
the handle area; its too blocky. needs some more roundness. have you ever held something square like that? it aint too comfortable. 2)
The magizine area isnt defined too well. You cant really tell where the magazine and the slot for it seperate. 3)
The barrel of it is solid. How would the bullets come out the barrel if its blocked up solid?
A few things about M's gun:
Blocky edges. I think that you could of made your gun more sleek, more smoother. 2)
The overall design of the gun is more complicated, therefor making more of a challenge.
Ok, theres my reasons
Nice job both you you!