Firing Pin Spring - fits all models (end with the most coils goes toward the spring cups).
Part number 10 on the Glock Schematic.
This "reduced power" spring will provide a smoother/easier trigger pull. It should be noted that the 4 lb spring can cause misfires so if it is used you MUST prove its reliability and shoot several hundred rounds without incidence. The combination of this spring with a 6# trigger spring can possibly cause trigger reset/safety engaging issues. If this happens you'll need to swap back to either a 5# trigger spring or firing pin spring.
Fits all Glock models. 1 spring cup = 2 halves - replace in pairs only. Part number 9 on the Glock Schematic.
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Complete kit with all the following LWD firing pin springs:
Lightweight Spring
Lightest we recommend
Recommend replacing every 6 months to maintain reliability
Can cause light primer...