CZ teamed up with ATI to develop a tactical chassis for the semi-automatic rimfire platform, the 512. Chambered in .22 LR or .22 WMR, it comes with a 16.5" cold hammer-forged barrel with 1/2 x 28 muzzle threads. The top-mounted Picatinny rail allows for the mounting of scopes, back-up sights, or other aimers. The stock has six positions of length-of-pull adjustment and a comb that's adjustable for comb height. The higher capacity magazine is the same reliable single-stack model used by CZ's trusted 455.