Firing Pin Block Plunger Spring Tuning Kit

1 x heavy and 1 x extra heavy firing pin block plunger tuning springs. Heavy spring can increase the SA pull up to 8 ounces. Extra heavy can increase the SA pull up to 14 ounces. An excellent way to tune your SA to your preference. USA Made from premium music wire.

Does not affect the DA pull weight.

$10.00