A few other neat little features, the stock is a compression stock. So in other words it compresses when the gun fires to reduce recoil. One of the preview images shows three buttons labeled L,FL, and G. The letters stand for L: Targeting Laser, FL: Flash Light, and G: Grenade Launcher. Everything is more compact around the triggers and uses a system similar to that of a tv remote. Just press the buttons to turn on or off the laser or flash light and fire the grenade launcher.
In case anyone is wondering the SMS doesn't really stand for anything I kind of just tacked that label on.
The model does have a small animation to it for the switching of the triggers.
Polygon Break down
Initial gun: 7946
Triggers: 320 each (two triggers total = 640)
Buttons and knobs: 592 total
Machine gun clip: 758
Machine gun High Cap clip: 1030
Sniper Clip: 234
Grenade Launcher: 849
Screws for grenade launcher: 222 each (444 total)
Bullet 398 each (18 bullets total = 7164)