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Reviews & Ratings for TANDEMKROSS GearBox Replacement Sear Spring — 7 reviews

(7 reviews)
TANDEMKROSS GearBox Replacement Sear Spring
TANDEMKROSS GearBox Replacement Sear Spring
$51.00 $29.99 Save 41%
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Buckmark gearbox

by Miyenta, Verified Owner from CA, United States Written on May 24, 2026
Makes the trigger lighter, but the reset could be better. Just a little better than the heggis flip.I wish somebody would make a target sear for the gun then it would be outstanding.
Would recommend: Yes
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TandemKross sear spring

by T242, Verified Owner from IL, United States Written on April 14, 2026
Well, this product is everything one could hope for. The OEM sear spring design is stunningly difficult to reinstall. The “Heggis flip” option wouldn’t work for me due to too light of tension when reversed. TK nailed it with their design which also provided a 1/2 lb. or so trigger pull reduction. Paired with their Victory trigger I am quite pleased with the way my Buckmark Black Label performs now. Highly recommended.
Would recommend: Yes
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Grateful OP Carriers Brand Names at Reasonable Prices

by tkeppa, Verified Owner from IN, United States Written on January 9, 2026
Just as listed and Happy with the purchase.

OptionsPlanet has been a competitive in prices and make it easy to process orders and make adjustment when needed.
Would recommend: Yes
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Great add on

by Randy Fulks, Verified Owner from IN, United States Written on February 2, 2025
If you follow the online video, it's pretty easy to install. I was hoping for a little less trigger pull. I have only shot 10 rounds, but so far, I am pleasantly surprised at the difference in trigger pull. It's a little on the pricey side, but it's worth it, in my opinion. I'm not a fan of the flat face trigger, so I am sticking with the factory one.
Would recommend: Yes
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Great product

by Jo, Verified Owner from TN, United States Written on December 22, 2024
Very nice upgrade I would definitely buy this again
Would recommend: Yes
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Heavy pull! No good.

by CR, Verified Owner from TX, United States Written on November 4, 2024
$30 for a spring that feels as bad as stock is an absolute waste of money for a Buckmark. Do a Heggis spring flip instead. It's free and it's better anyway.
Would recommend: No
0 of 1 found the following review helpful.
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Great improvement

by Joseph S., Verified Owner from CA, United States Written on September 19, 2024
Installation is a breeze. This took my Buckmark down to 2 lbs 2 oz. I also installed the tandemkross trigger. I don’t know if it contributed to the final trigger pull as I installed both at the same time. Jury is still out on the trigger but the gearbox is a solid upgrade imo.
Would recommend: Yes
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Last updated 2025-11-12 UTC.