Wolff Hammer Spring Pack S&W 39, 59, 909, 645, 4566, 1066, 410, 4003, 4044 with Long Hammer Spring Reduced Power

Product #: 978308 Wolff Gunsprings #: 26581
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Product Information

Hammer springs are available in a variety of weights to allow adjustment of the trigger and let-off to individual needs. Hammer spring packs offer a savings over individually purchased springs and are recommended when exact poundage desired is unknown. Installation requires disassembly and assembly of firearm.

Technical Information


Gunsmithing Required: No

  • Contains 1 each of 16, 17, and 18 lb reduced power hammer spring (Long)
  • For use in 39,439,539,639,3904,3906,3944,3946,59,459,559,659,5903,5904,5906,5923,5924,5926,5943,5944,5946,5967,909,910,915 9mm
  • 645,745,4605,4506,4526,4536,4546,4566,4567,4586,4596 45 ACP
  • 1006,1026,1066,1076,1086 10mm
  • 410,412,4003,4004,4006,4026,4043,4044,4046 40 S&W
  • Smith and Wesson pistols use two different hammer springs (Short and Long) for most centerfire semi auto pistols. Both springs have a factory rating of about 20 lb
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