What makes the CZ 457 unique
Three generations of Czech rimfire evolution produced the rimfire world's 'Lego' bolt action: one action, many barrels, and a huge aftermarket.
One action, many barrels
The barrel slips into the receiver and is held by two set screws, so .22 LR, .22 WMR and .17 HMR barrel sets can share one action. CZ markets this as user-swappable, but its Mini-set instructions say each barrel should be gunsmith-fitted and headspace-checked — we flag that conflict.
high Sources: [MINI] [CZUS] [MAN]60° bolt for real scopes
The 457 cut bolt rotation from the 455's 90° to 60°, giving clearance for larger ocular bells and lower rings — a direct fix for the older rifles' scope-hand clearance problem.
high Sources: [GA19] [GUNSMAG]A 70-year lineage
Brno Model 1 (1945) and ZKM 452 (1954) → CZ 455 (2010, set-screw barrels) → CZ 457 (2019): shorter slab-sided action, push-to-fire safety requested by US Hunter Ed and 4-H coaches, a new adjustable trigger and a striker about 2/3 lighter.
high Sources: [GUNSMAG] [GA19] [MAN]Backward-compatible where it counts
Barrels and magazines interchange with the CZ 455; .22 LR mags fit 452/453/455/457/512. Stocks, triggers and bottom metal do not.
high Sources: [MAN] [DATA]Competition workhorse
In the anonymous equipment survey from the first IPRF PR22 World Championship (2023, 179 shooters), the CZ 457 was the most common action.
med Sources: [ST8]Trigger you can actually tune
Standard trigger adjusts 1.8–3.4 lb plus take-up and overtravel; CZ adds a two-stage Flyweight option that fits all 457s.
high Sources: [MAN] [FLY]Every claim is cited; conflicts are flagged. See also history and the head-to-head.