Set consisting of:

• 2x Small White Spacers

• 2x Medium Spacers in Black

• 2x High Spacers in Red

They allow to gradually increase the compression of the firing pin spring by increasing its percussion on the primer.

Increases spring usage life by more than 100%

The kit offers 3 different compression settings.

Compatible for all Glock series Gen 3 - Gen 4 - Gen 5