"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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Wonderful Trigger
Dropped the pull weight to exactly 2 pounds 2 ounces at center of trigger, 1 pound 14 ounces at over travel screw hole as the pull point with the flat trigger also installed. It was a noticeable reduction with just the stock trigger, but did not measure weight with gauge.
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Gearbox Browning Buck Mark
Purchased the gearbox for my Buck Mark slab side. Instilled it in a few minutes with no complications. Watched install video once and had at it. In a couple minutes I was done. Skipped final step on video because I was sure the spring was positioned correctly. Have not shot as yet but will this weekend.
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Better than Expected
2nd "GearBox" (had a problem with the first one after about a month, my error; didn't see the lifetime warranty and trashed the box); other than that, the product works as advertised, is easy to install, and there was a noticeable reduction of trigger pull upon testing for function.
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GearBox
The installation was so easy I thought I messed something up and called customer support. They walked through the process and it was as simple as it seemed. I use my Buck Mark for the steel plate challenge and this helped with the trigger pull. I would recommend it. It will be nice when squirrel season rolls around. Buy it!
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Gear Box
I had previously done the sear spring flip and was left with unreliable trigger reset. I installed the gear box and got reduced trigger pull and 100% reliability. Reasonably priced, easy to install, and excellent reliability-it's great!
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Gear box
Works great simple to install low trigger pull great product
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Good for Newer Buckmark
This trigger works great for the newer Buckmark. I have one that was made in the early 1990s. I didn't work in it all. On the other hand, my newer pistol didn't have a problem with it. If you have a newer Buckmark pistol, I highly recommend this.
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Gearbox
Easy to install and helped my long range accuracy. Well worth the money
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Well worth it!
This is the best upgrade I have made to my BuckMark! My gun now shoots better than ever! I cannot say enough good things about it. Everyone who owns a BuckMark should upgrade to the GearBox. It's easy to install and it makes a world of difference.
