Proof Research 22LR CZ 455/457 Steel Pre-Fit Barrel

You will love the Proof Research 22LR CZ 455/457 Steel Pre-Fit Barrel if you are a fan of the CZ 455/457 22LR. Proof Research make their steel barrels in house with the exact same vow to quality and consistency as they put into the carbon fiber barrels. The drilling, rifling, and lapping process is identical to their composite barrels. They start with the same steel used in the carbon fiber barrels. It is a double stress relieved 416R stainless steel, a pre hardened chromium stainless steel that was specifically made by engineers in collaboration with rifle barrel makers to give the consistent, high quality and durability this industry demands.

22LR CZ 455/457 Steel Pre-Fit Barrel Features


Excellent erosion wear characteristics and corrosion resistance.

Extreme Pressure Resistance

An optimum combination of high tensile strength along with requisite toughness to withstand extreme chamber pressures encountered during firing.

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Proof Research 22LR CZ 455/457 Steel Pre-Fit Barrel



Part Number Barrel Length Twist Rate Muzzle Thread Contour Weight
121436 16.1″ 16 1/2-28 Bull 2lbs 6oz
121450 18.5″ 16 1/2-28 Bull 2lbs 12oz
127278 20″ 16 1/2-28 Bull 3lbs 1oz


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Additional information

Weight N/A
Barrel Length

16.1" 121436, 18.5" 121450, 20" 127278


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