Description

CZ 457 Trigger Spring Kit

This spring is a replacement for the trigger pull spring of a CZ 457 rifle. It reduces the minimum trigger weight of the trigger from ~800 g to ~490 g (~1,8 lb to ~1,1 lb), or approx. 38% (the exact value is dependent on the individual firearm). The trigger can still be adjusted to a max. pull weight of about 1,4 kg (3 lb) if needed.

We typically measure minimum trigger weights between 450 g and 550 g (~1 lb to ~1,2 lb) when using our spring. We’ve tried lighter springs, but we haven’t been able to consistently achieve more trigger weight reduction using these. This is because the sear engagement plays the biggest role in the trigger weight of the CZ 457 rifles. If you reduce the spring force, you usually have to increase the sear engagement to have a safe trigger that will pass a drop test. In our tests you then end up with a trigger weight about the same as with the heavier spring. We feel our spring hits that sweet spot of maximum weight reduction without compromising on safety.

A good way to estimate the trigger weight you might achieve, is to measure the minimum trigger weight of your firearm, and multiply the value by 0,62. It doesn’t work for all firearms, but for most it gets you in the ballpark. Example: 750 g * 0,62 = 465 g

Made from 1.4310 / X10CrNi18-8 Stainless Steel, so it’s corrosion resistant, unlike most other available springs. Spring has closed and ground ends, just like the factory spring.

Included in the package:

• Trigger Spring
• Small Bench Block
• Warranty Card

30 YEAR WARRANTY

Disclaimers

Spring should only be installed by a qualified gunsmith.

The trigger weight of your individual firearm can vary by up to +- 250g (+- ~0,6lb) compared to the value published. This is due to the manufacturing tolerances of the firearm. For more information on this, check out our FAQ on this topic: https://www.insimbioutdoor.com/info/