.50 Cal Refillable Bullet Pen - Made From a Real 50 caliber BMG Round The ONLY 100% real 50 caliber BMG bullet pen on Amazon - the others have plastic or milled parts Made from real .50 Browning Machine gun brass and real .50 cal projectile Shock resistant, water resistant and Flame resistant rifle pen Veteran owned company - Made in the USA Refillable, All Metal and virtually indestrucable ball point pen