CZ 455 and 457 rifles have been the standard for .22 competition series for many years. The varmint rifle has quite a few adjustments built in that most other offerings at a similar price may not. The Luth-AR stock attaches to a carbine buffer tube. This lets you change the length of pull. The cheek piece is adjustable for height. Other features include an AR style grip, M-LOK slots and QD sling swivel points. The push to fire safety is intuitive and fast to use when you need to turn it on or off. The 60° bolt throw is very fast to cycle and allows for your scope to be closer to the centerline of you rifle if that is your preference. You can adjust the trigger for creep, weight and over-travel. Swapping your barrel out is very easy on the 457 when you need to change calibers.