Instructions: You have to cycle the gun before you can fire. If you run out of ammo you have to release the mag and grab a fresh mag and insert it. Fresh mags are on the bottom left of the screen. Controls: Space or click to fire C to cycle (You can also click and drag the bolt to cycle it.) R to release magazine (You can also click the mag release or hit it with a magazine) A to toggle advanced graphics (It might cause lag) F to switch between FPS settings S to show/hide customizations B to mute/unmute background music Up/Down keys to change simulation speed (You can't go above 100% unless your game is running at 60FPS) Left/Right keys to change recoil control 1 to change stock paint 2 to change dust cover paint 3 to toggle rainbow paint (If you have unlocked it) 4 to change muzzle attachment 5 to change magazine type