Despite its popularity, there are three main issues that frequently pop up in the community:
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
It is widely considered the best upgrade for competitive shooting or rapid-fire "mag dumps" due to its hair-trigger nature. ⚠️ Known Plot Twists (Troubleshooting) Despite its popularity, there are three main issues