Hmm....
It looks bad. If this took you an hour, you badly rushed it.
The front barrel is huge. It doesn't even match with itself. At first it's round, then it's a box. I don't know what you did, but it looks like a bunch of boxes mashed together. It looks terrible. The trigger for the grenade launcher is a little box stub. It's also so far down because of the massive barrel, that you're going to need to hold the bototm of the clip to shoot it. There is no hole in the grenade launchey, yet there is a hole in the silencer. It seems liek the gigantic barrel made the clip into a little stick. It doesn't match with the size of the rest of the gun. Whatever you did to the handle, it's bad. It looks morphed up. It's as if it went through a heater and melted. The trigger is just a box sticking out. The buttstock is tiny. It looks like something your would put on a toy pistol. The barrel is so huge, it's about 3x the size of the tiny buttstock. I don't understand the need for the weird thing infront of the laser. It doesn't really server a purpose. Did you just shove shapes together for this? It looks like it.
I surely hope you don't put this in Blockland. There are many things to improve on.
