If we were to pick one thing that our previous rimfire platforms were lacking, it was an American-style push-to-fire safety something Hunter s Education instructors and 4-H shooting coaches have begged us to incorporate for years. Though that was the most obvious change, we also took the opportunity to tweak a load of small things at the same time. 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 bolt rotation in favor of 60 , 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. With the exact same swappable barrel system as the 455 and the same reliable polymer magazine system, the 457 is without a doubt the best rimfire platform we ve ever fielded. Technical Specifications Product Name CZ 457 Varmint, 22 LR Chambering .22 LR Rate Of Twist 1:16 in Magazine Capacity 5 Magazine Type Detachable Stock Turkish Walnut, Varmint-Style Sights No Sights, Integrated 11mm Dovetail Barrel Cold Hammer Forged Barrel Length 20.5 in Weight 7.08 lbs Trigger Mech Adjustable Safety Two-Position, Push-To-Fire