The Glock Gen4 dual captured recoil spring
assembly is a factory replacement part for the Glock 21
pistol. The recoil spring assembly is constructed of stainless steel with chrome silicon springs. The Gen 4 recoil spring assemblies are designed to withstand 5,000 rounds
before they should be replaced to maintain reliability. This assembly will not work with the Gen2 or Gen3.
- Fits: Generation 4 (Gen4) Glock 21
- Design: Dual Captured Recoil Spring
- Material: Stainless Steel, Chrome Silicon Springs
Glock recommends recoil spring replacement at an interval of 5,000 rounds.