Alg-trigger-kp9 -

Installing an ALG AKT trigger in a KP-9 is rarely a "drop-in" experience without minor fitting.

You often need to squeeze the trigger while rotating the safety lever back into position during the initial install.

There has been historical debate about the harder ALG hammer "peening" (deforming) the rear of the bolt carrier over thousands of rounds, leading some users to polish or "profile" the hammer face to match the factory geometry. alg-trigger-kp9

Some users report constant light primer strikes. This is often solved by ensuring the main spring is properly seated or using the high-tension auxiliary spring provided by ALG.

Pull weight often drops from a factory ~5 lbs to a crisp 2–2.5 lbs . Installing an ALG AKT trigger in a KP-9

New setups may experience the bolt "hanging" on the hammer when manually cycling. This typically goes away after a "break-in" period of shooting or by applying lithium grease to the contact points. 💡 Key Tip

If you find the trigger for a defensive firearm, you can install the included auxiliary spring to increase the pull weight by about 0.5–1 lb, making it more predictable. Some users report constant light primer strikes

A common "scary" moment for new installers is when the bolt carrier doesn't slide back in easily. This usually happens because the ALG hammer has a different profile than the factory one and requires a firm push or slight polishing to smooth out the travel. ⚡ Performance Gains