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The barrel of the CZ 457 can be easily changed and replaced with other barrels designed for rimfire ammunition. Given the removable barrel, commonality with the CZ 455, as well as a compact trigger group, aftermarket parts are available both in the American and European sporting market.
The CZ 452 first appeared in 1954 as the Model 2 (ZKM 452), and was a refinement of the CZ Model 1 (ZKM-451) .22-calibre rimfire bolt-action training rifle that first appeared in 1947. ZKM is an acronym for Zbrojovka-Koucký-Malorážka, the rifle's manufacturer ([Česká] Z brojovka), designer (Josef K oucký) and M alorážka - for rimfire ...
The CZ 452 features a carbon steel barrel that is threaded into the receiver frame, except for rifles chambered for .17 HM2 which have the barrel pinned to the receiver. Rifles of recent manufacture feature hammer forged and lapped barrels. The receiver has a dovetail rail for mounting a telescopic sight. The dovetail is either 11 mm or 3/8 ...
CZ 457 - Bolt-action rifle in .22 LR caliber; CZ 600 - Bolt-action rifle; CZ-USA Field Sports - Shotgun; CZ TSR - A sniper rifle in 7.62×51mm NATO caliber; CZ BREN 2 - Assault rifle in 5.56×45mm NATO and 7.62×39mm caliber; CZ 805 G1 - Grenade launcher
Attaching the barrel to the receiver using a barrel nut and a barrel with a shoulder is an alternative to action threads, which has been used in firearms such as the Sten gun and AR-15. Hand tools Quick barrel change systems is an increasingly popular alternative, as seen in for example SIG Sauer 200 STR, Roessler Titan or Blaser R8.
The Model 15-2 could be ordered as "Pistol Pacs" with 3 (initially) and later 4 (or more) barrel/shroud sets shipped inside a fiberglass briefcase with barrel changing tool and clearance gauges; however, most pistols were sold with only one barrel, with the buyers able to purchase other barrels later.
The type of threads used vary between firearms. European firearms often use either M6 1 or M8 1.25 threads, for example M6 is used on the SIG Sauer 200 STR, Blaser R93, Blaser R8, CZ 457 [30] and Bergara rifles, [30] while M8 is used on the Sako TRG and SIG Sauer 404. Many American firearms instead use 1/4" 28 TPI (6.35 0.907 mm) or 5/16" 24 ...
Along with all the variants listed below, a unique design feature of the 422 was the fact that the barrel resided in a low position in the frame just above the trigger guard. The barrel is non-moving and fixed to the frame. It came threaded from the factory, but the "barrel nut" was used to affix the barrel to the frame.