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
156 Reviews
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Must have addition
This along with the flat trigger really sweetened my pull weight on my Buckmark to the point I was looking for. It was a little tricky installing it, but nothing I couldn't handle.
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gearbox for browning
easy to install, very good
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Quality
Great change to existing spring.
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Gearbox for Browning Buck Mark
I couldn't believe how much this simple change reduced the trigger pull. If you haven't removed the trigger spring on the Buck Mark before, make sure you look at the installation video before you install this. You'll learn a lot.
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Gearbox For BuckMark
The product seems to reduce creep/mushy feel as much or more than perceived pull weight. 4 Stars due to unknown longevity and No Written Instructions.
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Gearbox for Buckmark
This is a great product. Easy to install. Make sure to move the spring end over after you install it. Use a small screwdriver or pick. Make sure you hear this click. The trigger is much better with this piece than the spring flip.
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Gearbox for my Buckmark
Very easy install with a measured 1/2 LB pull weight decrease. The product delivers as promised!
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Buckmark gearbox
Easy install, dropped my trigger pull by half a pound
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A great addition to my Buckmark.
I originally tried to lighten my trigger pull using the Heggis Flip method. It definitely lightened the pull weight, but so much so that I was getting unintended double taps - unsafe to say the least. I tried several times to return the sear spring to factory configuration but finally gave up in frustration. I eventually came across the TK Gearbox captive spring while watching Youtube videos and decided to give it a try. It's easily one of the best, easiest mods I've made tonany of my pistols. My trigger pull is lighter and smoother than it came from the factory, but not so light that it's unsafe. Simply an outstanding modification. Based on the performance, I've just ordered the Halo Type A charging ring and I'm about to order the Game Changer Pro Compensator and Essential Maintenance Kit as well. It's time to show my Buckmark a little love.
