.50 cal

(розм.) кулемет калібру 12,7 мм (Struecker’s Humvee, with its .50 cal in the turret, took the lead. - Bowden, Mark. `Black Hawk Down` - p. 54) (Then they told me to take a seat behind the 50-cal. I climbed into the gun nest, grabbed the big handles. - Harry, The Duke of Sussex, Prince. Spare, p. 146)