Welcoming a new addition to our Spirit Serious Collection! Say it loud and say proud with our Olive Drab Gadsden Flag Don't Tread on Me 50 Caliber Bullet Bottle Opener! The 50 Cal BMG (Browning machine gun) is best known for its use in the U.S. Military's heavy machine guns. Due to its high power, it is also used as a sniper round and for disabling lightly-armored vehicles. Crack open a cold one like a BOSS!