Algodoo

An FN-SCAR style gas operated select fire sub machine gun.

It works really well on my computer, but my computer is kinda cruddy, so I don't know how it'll work on other better quality computers.
The bullets don't go very fast (about 61 m/ps), but I'll try to fix that later. My main focus was reliability, not man stopping power.

Comes fully loaded, with 14 rounds in the magazine +1 in the chamber

Features:

14 round detatchable mag
Semi Auto/Automatic fire
Adjustable shoulder stock
Gas-Op mechanism
Upper/Lower Weaver rails

Keyboard controls:

Enter/Return - Pull Trigger
\ (Back Slash) Release Magazine
] (Right Bracket) - Stock Lever

If the gun doesn't work in any way, go ahead and leave a comment about it, and I'll try to fix it.

Credits: Some of the internals are based off of one of J-Dewd's guns.

P.S.: Is making a gas op mechanism really hard for anybody else? I've tried like five times to make a gas operating mechanism, but it never worked until now.