"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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Buckmark gearbox
Works like a charm actually reduced trigger pull to around two lbs. Sweet. So glad i made the purchase.
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Gearbox
Very easy install. Also installed Victory trigger. Between the two cut triggering pull in half! When I reviewed the trigger, I indicated I had installed a Thunder hammer in the Browning. That was an error, the hammer was installed in a SW Victory. Sorry! Buy the trigger and gearbox, you will not be disappointed!
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The GearBox is great
The GearBox made a significant improvement to the trigger pull of my Buckmark. It had a crisp trigger, but I always thought the heavy pull on mine was a real downside and impacted accuracy. I installed the GearBox, and what a difference! I just went through 200 rounds after the install, and it functioned perfectly. The gun is so much more fun now that the trigger pull is lighter.
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Must Have!!
Excellent upgrade. Reduced trigger pull and seems to also slightly reduce trigger travel.
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gearbox
i love this gearbox.very easy to install.my triger feel's great and smooth.i love it.
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Didn't work for me.
Got this because I'd read that flipping the sear spring to get a lighter trigger pull was difficult. Installed the gearbox according to instructions, including moving the spring over so it popped out of the slot and pressed against the sear. It didn't apply enough pressure to the sear for the sear to engage the hammer. Tried reinstalling several times with same results. I ended up flipping the original sear spring (it really isn't all that hard) and got a beautiful light trigger pull sith no problems. Returned gearbox to TK for refund. Great customer service!
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use with Tandemkross trigger
Get this with the Tandemkross straight trigger. You won't reget it! Feels like a finely tuned 1911 trigger!
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Excellent product
This is a great product and money very well spent. I'd say it probably reduced the trigger pull by about a pound and that makes a huge difference in the way the gun handles. Also, customer support was extremely efficient and friendly. Be sure to watch the installation video - installation is not hard, but it will be that much quicker if you just watch the video first. Happy plinking!
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Great part, easy install
This is a great part and it is very easy to install. Do yourself a favor and order the victory trigger at the same time, when installed together they gave me a 2 lb trigger pull that felt great. I highly recommend this part!
