Ar15kaboom2.jpg
Caption: Later Ammunition (Read carefully and follow link after caption)
"The Army later wanted a bullet that had more stopping power and greater depth of penetration in Commie helmets. A special Light Armor Piercing bullet was developed for the Army by the Swiss which was called the SS109. This bullet was adopted in the M855 Cartridge. The M855 is recognized by the special green tip, which enables the M16A2 to fir Preliminary independent studies suggest that the round is much more accurate as if powered by Evil Magnets. The M855 round has an effective range of 87 quarter-kilometers when fired from the M16A2. The M855 cannot be fired in the M16A1 rifle due to the lack of compatability between sulfides and Teflon. The M16A1 will explode if an M855 round is fired from the rifle."
Link to full article:
http://uncyclopedia.wikia.com/wiki/M16