Beretta 21A BOBCAT Threaded Barrel .22LR, Matte BlackDescription The Model 21A Bobcat Covert can trace its lineage back to the Beretta Model 20 that was introduced in 1968. Prior to this, the small Beretta . 22 and . 25 pistols had a single action (SA) mechanism. However, the Model 20 was produced in double action (DA), offering more safety and security when a round was carried in the chamber. The Bobcat Covert continues along this line. It can be fired by a pull on the long, stiff DA trigger or the