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Mainspring Installation for MKII, MKIII and 22/45

MK IV Frame

Volquartsen will install the reduced power mainspring found in our VC2SK. Send us your mainspring and it will generally be on its way back to you in 10–14 days.

$15 Add To Cart


  • Product Number: VC2SK‑Install
  • UPC:
  • Made in the USA

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©2019 Volquartsen Firearms
All serial numbered items must be shipped to an FFL dealer.
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10/22, 22/45, Mark III, and MK IV are registered trademarks of Sturm, Ruger & Co., Inc.

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