XS Sight Systems. Tritium Big Dot Express. Stopping power, concealability - that’s what the new double-action Tomcat is all about. Using 60-grain .32 ACP hollow-point ammunition, this latest addition to Beretta’s small frame collection provides firepower equaling the punch of a .380. Yet, all this serious capability is packed into a compact, lightweight, 4.9 inch (125 mm), 14.5 ounce (400 gr.) package. A drift-adjustable rear sight provides for superior accuracy.