Product Description The TANDEMKROSS GearBox is a precision-engineered, drop-in replacement sear spring designed specifically for the Browning Buck Mark pistol. While the Buck Mark ships with a capable factory trigger, many owners seek to reduce trigger pull weight and refine the overall feel. Rather than relying on complicated and potentially risky DIY methods such as the well-known "Heggis Flip" or sear spring flip, the GearBox offers a reliable, consistent solution. It includes a redesigned torsion spring housed within a polymer installation frame that captures the spring during installation and then acts as a guide to ensure proper alignment and consistent engagement with the sear. The result is a trigger pull weight reduction of 0.5 lbs or more, with no guesswork or improvisation required. For the ultimate trigger performance on your Browning Buck Mark, pair the GearBox with the TANDEMKROSS "Victory" Trigger. Product Highlights Upgraded sear spring reduces trigger pull weight by 0.5 lbs or more for a noticeably improved trigger feel Polymer installation frame captures the spring for effortless drop-in installation and consistent sear engagement Eliminates the need for risky DIY modifications such as the "Heggis Flip" or Buck Mark sear spring flip Redesigned torsion spring ensures proper alignment within the fire control system for reliable performance Designed as a direct fit for the Browning Buck Mark; pairs ideally with the TANDEMKROSS "Victory" Trigger Specs Brand: TANDEMKROSS Manufacturer Part Number (MPN): TK12N0317BLK1 UPC: 769498483640 Color: Black Material: Polymer Compatible Firearm: Browning Buck Mark Trigger Pull Weight Reduction: 0.5 lbs or more Disclaimer: We strive to provide accurate and up-to-date product descriptions, specifications, and images; however, errors or omissions may occasionally occur. We are not responsible for any inaccuracies or discrepancies in the content provided. If you notice anything incorrect or unclear, please contact us so we can correct it. When in doubt, we recommend verifying details directly with the product&';s manufacturer. ]]>