TandemKross GearBox Sear Spring for Browning Buck Mark

The TandemKross GearBox is a drop-in replacement captured sear spring designed specifically for Browning Buck Mark pistols. This upgraded spring assembly makes installation easier while delivering a noticeably lighter, crisper trigger pull.

The GearBox lowers the factory trigger pull weight by 0.5 lbs or more, reducing the typical Buck Mark trigger pull from 4.1 lbs down to approximately 2.6 lbs. The captured design holds the spring securely during installation and service, making it easier to swap out and reinstall than the factory sear spring.

As a true drop-in replacement for the factory Buck Mark sear spring, the GearBox installs without permanent modifications to the pistol. It is a straightforward, reversible trigger upgrade for Buck Mark owners seeking improved trigger feel from their pistol.