"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
Very easy to install, improves trigger pull over the dangerous reversed sear spring mod (double fire problem) that I had on one of my Buck Marks. I bought 2 more for my other pistols
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Great option
Makes the Buckmark feel more complete. I did find out mine had another part that was actually broken but I was able to get it working and it feels amazing. Great pull and I had a nonexistent reset and this fixed it! Would recommend.
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Buckmark Gear Box
Put this on a Buckmark Camper that had a 4lb. Trigger pull. The trigger pull is now 2-3/4 lb. Easier to install than doing a spring flip.
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GearBox
havnt installed yet ordered from Australia arrived super early this time.
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Gearbox
Outstanding. Simple install. Took trigger pull from 5.1# to 2.6#
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Gear Box
A very easy drop in to reduce trigger pull
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GearBox
Love it. Great trigger upgrade.
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So, so simple to fit
I was amazed at how simple this was to fit! Immediate improvement to the trigger weight.
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A life saver
After messing with the original spring for four hours I finally broke down and bought the gearbox. What a dream to install. Great idea
