CZ USA 457 ProVarmint Suppressor-Ready Black Bolt Action Rifle - 22 Long Rifle - 16in - The Pro Varmint has a heavy 16in barrel threaded 1/2x28 for use with a suppressor or other muzzle device. Riding in a black-painted laminate stock, it incorporates features found on much more expensive stocks. In addition to the receiver-mounted, push-to-fire safety, we chopped almost an inch of length from the action and slab-sided it to reduce its footprint and weight. The stamped bottom metal of the 455 is gone, swapped for a classy two-piece interlocking system. To make scope fitment easier, we ditched the 90 degree bolt rotation in favor of 60 degree, allowing for larger ocular bell diameters with lower ring heights. To top it all off, the 457 now features a trigger adjustable for weight, creep, and over-travel.