"GearBox" Installation Instructions for the Browning Buck Mark
At a glance:
- Upgraded sear spring lowers trigger pull weight by .5lbs or more!*
- Installation frame houses spring for easy installation and consistent sear engagement
- No need to experiment with DIY spring fixes - one simple drop-in replacement!
The Browning Buck Mark has a great trigger right out of the box. But if you’re like many Browning Buck Mark owners, you’ve likely researched ways to lower the gun’s trigger pull weight and adjust the feel even further.
There are many DIY solutions out there, including the well-known “Heggis Flip” or Buck Mark sear spring flip. But these solutions can be complicated to perform, provide inconsistent results and can cause potentially dangerous issues with the fire control system.
Put an end to DIY fixes with the new “GearBox” for Browning Buck Mark from TANDEMKROSS! The “GearBox” is a simple, drop-in replacement for the factory Buck Mark sear spring that makes installation easier and lightens the trigger pull weight.
The “GearBox” comes complete with a redesigned torsion spring housed in a polymer installation frame. The frame captures the spring for easy installation and then, once installed, works as a guide for the spring, ensuring proper alignment and consistent engagement with the sear.
Simplify your trigger upgrades and install the TANDEMKROSS “GearBox” today. Pair with a Browning Buck Mark “Victory” Trigger for ultimate performance!
*Individual trigger pull weight results may vary.
*Fits all Buck Mark models including the Buck Mark Rifle
137 Reviews
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Gearbox for Buckmark
Easy to install , not necessary to remove grips as shown in installation video . reduced stock pull about 1 pound to now 2.86 pounds . Also the feel is more constant in pressure . Highly recommended .
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Gearbox
I installed the Gearbox along with the Tandemkross victory trigger in my Browning Buckmark pistol. The factory trigger wasn’t bad, but the new setup is definitely better. I didn’t weigh trigger pull before or after, but it definitely feels lighter. Overall trigger travel is reduced also with the victory trigger. Overall I am very pleased with the upgrade.
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Must have
Take a good look at your Buck Mark sear spring - there's no lateral support so it's free to squirm around however it wants under compression, so forget consistency. The Gear Box solves that completely. Bonus, you also lose the heavy trigger at the same time. Mine is now 2 lbs 2 oz, and I'm happy. Take your time, pay attention to the video, follow the instructions and you will be fine.
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Gearbox
Works like a charm, very easy install
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Gear box
Made notices noticeable difference. I'd buy it again
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Gear Bix
The gear box is simple and straight forward. Installation is easy. Works as advertised.
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Gearbox
Great product. Works perfect and I will be buying the Victory trigger as my next upgrade add. Quick and easy to install.
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This product is awesome
I received this as a Christmas gift and this product is awesome. It works really well.
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Gear Box
Great improvement for the trigger, easy to install. To get the best trigger use with the Tandemkross trigger.
