The game is allright, the idea is pretty nice, there are multiple choices, but not too many. You can create pretty much different kinds of M16s, but it needs a reset button in the game itself. It resets itself when pressing back, but the back and the parts buttons seem to be a little bit too close to eachother. Quality buttons are there and also mute button is there.
Sometimes the parts stack in an unfortunate way you wouldn't wish they would. But everything can't be perfect. Thus I give this game a rating of 4/5.