Browning Buck Mark Micro Bull, Semi-automatic, Metal Frame Pistol, 22 LR, 4 Barrel, Flat Dark Earth/Black UFX Grips, Matte Finish, Black, Blade Front/Adjustable Rear Sights, 10 Rounds, 2 Magazines 051603490 The Browning Buck Mark is a favorite among rimfire plinkers and competitive shooters. The single-action, blowback operated autoloading design is one of simplicity and reliability. The controls are easy to reach and use. This model features a 4" steel barrel that retains heft to improve stability and accuracy.