Trigger upgrade, various Harder & Steenbeck models

Trigger upgrade / tuning kit for various harder & Steenbeck models that uses the new Evolution 2024 trigger assembly & needle spring.

Offers tighter trigger feel & makes for quicker & easier reassembly thanks to the auxiliary lever which is no longer free to rotate.

Suitable for;

* Ultra, all models.
* Evolution, all models
* Infinity, all models