SERVICE PAK - TYPE I - contains the following springs to replace
weakened or broken springs, returning the pistol to original factory
condition: recoil spring, striker spring, extractor spring and trigger
spring.

Type I - contains the following factory specification springs:factory
weight recoil spring, firing pin spring (extra power),hammer spring,
magazine catch spring, plunger tube spring, firing pin safety
spring and sear spring.
New Item.