Matching the recoil spring setup to your ammunition can reduce felt recoil to improve accuracy and speed.
Fully adjustable recoil reduction system for Glock Gen 5. http://www.youtube.com/watch?v=OpHN-meR3CU
Aluminium weight also adds mounting points for thumb rest.
Brass weight to increase weight of Glocks.
Steel guide rod for Glock Gen 5.