Recoil springs are available in a variety of load ratings to allow adjustment of the recoil function to meet various requirements. All load-rated recoil springs include an extra power firing pin spring. Recoil Calibration paks listed below recoil springs when available.
All recoil springs below are conventional design unless noted otherwise. Not for use in M&P series pistols.
 

RECOIL SPRINGS

For Use in:
    39, 439, 539 ,639, 3904, 3906, 3944, 3946, 9mm
    59, 459, 559, 659, 5903, 5904, 5906, 9mm
    5923, 5924, 5926, 5943, 5944, 5946, 9mm
    659, 909, 910, 915, 9mm

• Reduced Power...: 8, 10 & 12 Lb.
• Factory Standard.: 14 Lb.
• Extra Power........: 16, 17, 18, 20 & 22 Lb.

Recoil Calibration Pak below includes 1 each 14 pound factory recoil spring and 1 each of 16, 17, 18 and 20 pound extra power recoil springs. 3 extra power firing pin springs are also included.

For Use in:  
   469, 669, 908, 3913, 3914, 9mm
   3953, 3954, 5943, 5967, 6904, 9mm
   6906, 6924, 6926, 6944, 6946, 9mm

• Reduced Power...: 14 Lb.
• Factory Standard.: 15 Lb.
• Extra Power........: 16, 17, 18 & 20 Lb.

Recoil Calibration Pak below includes 1 each 15 pound factory recoil spring and 1 each of 16, 17, 18 and 20 pound extra power recoil springs. 3 extra power firing pin springs are also included.

For Use in:    
   645, 745, 4506, 4526, 4546, .45ACP

• Reduced Power : 8, 9, 10, 11 & 12 Lb. (Variable)
• Factory Standard : 14 Lb.
• Extra Power : 15, 16, 17, 18, 20, 22 & 24 Lb.

Recoil Calibration Pak below includes 1 each of 15, 16, 17, 18 and 20 pound extra power recoil springs. 3 extra power firing pin springs are also included.

For Use in:
    4013*, 4014*, 4053*, 4054*, .40 S&W
    4516, 4516-1, 4536, 4556, 4596, .45 ACP (Call for 4516)
      * Not for Rev. 4, dual recoil spring models.

• Reduced Power...: 15 Lb.
• Factory Standard.: 16 Lb.
• Extra Power........: 17, 19, 21 & 23 Lb.

Recoil Calibration Pak below includes 1 each 16 pound factory recoil spring and 1 each of 17, 19 and 21 pound extra power recoil springs. 3 extra power firing pin springs are also included.

For Use in:
    4566, 4567, 4576, 4586, .45 ACP
    1066, 1076, 1086, 10mm

• Reduced Power...: 14 & 16 Lb.
• Factory Standard.: 17 Lb.
• Extra Power........: 18, 19, 20 & 22 Lb.

Recoil Calibration Pak below includes 1 each 17 pound factory recoil spring and 1 each of 18, 19, 20 and 22 pound extra power recoil springs. 3 extra power firing pin springs are also included.

For Use in:
    1006 and 1026, 10mm

• Reduced Power...: 14, 15, 16 & 17 Lb.
• Factory Standard.: 18 Lb.
• Extra Power........: 20, 22 & 24 Lb.

For Use in:   
  410, 411, .40 S&W 
  4003, 4004, 4006, 4026, 4043, 4044, 4046, .40 S&W

• Reduced Power...: 12, 14 & 16 Lb.
• Factory Standard.: 17 Lb.
• Extra Power........: 18, 20 & 22 Lb.

Recoil Calibration Pak below includes 1 each 17 pound factory recoil spring and 1 each of 18, 20 and 22 pound extra power recoil springs. 3 extra power firing pin springs are also included.

For Use in:
    41, .22 Caliber - All Variable Recoil Springs

• Reduced Power...: 6, 6.5 & 7 Lb.
• Factory Standard.: 7.5 Lb.
• Extra Power........: 8 Lb.

Recoil Calibration Pak includes 1 each of 6, 6.5 and 7 pound reduced power variable recoil springs. 3 extra power firing pin springs are also included.

For Use in:    
   422, 622, 2206, 2213, 2214, .22 Caliber

• Reduced Power...: 4.5, 5 & 5.5 Lb,
• Factory Standard.: 6 Lb.
• Extra Power........: None Available

For Use in:    
   52-2, .38 Special - All Variable Recoil Springs

• Reduced Power...: 7 Lb.
• Factory Standard.: 8 Lb.
• Extra Power........: 9 & 10 Lb.

Recoil Calibration Pak below includes 1 each 8 pound factory and 1 each of 9 and 10 pound extra power, variable recoil springs. 3 extra power firing pin springs are also included.

Smith & Wesson pistols use 2 different hammer springs (Long - Group A & Short - Group B) for most centerfire semi-automatic pistols. Both springs have a factory rating of about 20 pounds. Hammer Spring Paks listed below individual hammer springs.
 

GROUP A Pistols - Long
For Use in:
    39*, 439, 539, 639, 3904, 3906, 3944, 3946, 9mm
    59*, 459, 559, 659, 5903, 5904 and 5906, 9mm
    5923, 5924, 5926, 5943, 5944, 5946, 5967, 9mm
    909, 910, 915, 9mm
    645, 745, 4506, 4526, 4536**, 4546, .45 ACP
    4566, 4567, 4576, 4586, 4596, .45 ACP
    1006, 1026, 1066**, 1076, 1086, 10mm
    410, 411, .40 S&W
    4003,4004, 4006,4026,4043,4044,4046***, .40 S&W

    *Early 39/ 59 pistols had a 22 Lb. factory spring.
    ** Some pistols may have short hammer springs
    ***Some 4046's have a 16 Lb. factory hammer spring.

• Reduced Power...: 16, 17 & 18 Lb.
• Factory Standard.: 20 Lb.
• Extra Power........: 22 & 23 Lb.

GROUP B Pistols - Short
For Use in:
    469, 669, 6904, 6906, 6924, 6926, 6944*, 6946*, 9mm
    3913(all), 3914 (all), 3953* and 3954*, 9mm
    4516, 4516-1 and 4556, .45 ACP
    457, 4013, 4014, 4053* and 4054*, .40 S&W
    * Some models have a 17 Lb. factory hammer spring.

• Reduced Power...: 17, 18 & 19 Lb.
• Factory Standard.: 20 Lb.
• Extra Power........: None Available

Not for use in models 52-2, Sigma Series, and M&P Series
Reduced power trigger return spring pak (draw bar plunger spring) offers 3 different springs to help improve double-action trigger performance in all Smith & Wesson centerfire semiautomatics in 9mm, 10mm, .45 ACP and .40 S&W calibers. Pak contains 1 each of 2.5, 3.0 and 3.5 pound reduced power trigger return springs to allow varying adjustment of the trigger. The factory spring is 4 pounds. These springs are particularly beneficial when used in conjunction with reduced power hammer springs listed above.

WARNING: Springs are for competition use only - NOT for duty use. 

Magazine springs for Smith & Wesson pistols are available in +5% for all listed models as well as +10% for selected models.

For Use in:
    469, 669, 6904, 6906, 6924, 6926, 6944, 6946, 9mm
    411,4003,4004, 4006,4026,4043,4044,4046, 4013 TSW (9 ROUND) .40 S&W

For Use in:
    4013, 4014, 4053 and 4054, .40 S&W

*Not for use in 4013 TSW 9 Round double stack magazines. See S&W 6900 series for 4013 TSW*

Firing Pin Spring - Available in extra power rating.

For Use in:
    39, 439, 539, 639, 3904, 3906, 3913, 3914, 3944, 3946, 3953, 3954,
    59, 459, 559, 659, 5903, 5904, 5906, 5923, 5924, 5926, 5943, 5944,
    5946, 5967, 469, 669, 6904,6906, 6924,6926, 6944, 6946,
    410, 411, 4003, 4004, 4006,4026,4043,4044, 4046,
    910, 915

Firing Pin Spring - Availble in extra power rating.

For Use in:
    645, 745, 4505, 4506, 4516, 4516-1, 4526, 4536, 457, 4546, 4556,
    4566, 4567, 4576, 4586, 4596,
    1006, 1026, 1066, 1076, 1086
    4013, 4014, 4053, 4054

Extractor spring - 6.5 pounds (factory spring is 6 pounds)
 

For Use in:
    39, 439, 539, 3904, 3906, 3944, 3946, 3953, 3954,
    59, 459, 559, 659, 5903, 5904, 5906, 5923, 5924, 5926, 5943,
    5944, 5946, 5967,
    410, 411, 4003,4004, 4006, 4026, 4043, 4044, 4046,
    910, 915

Extractor spring - 10 pounds (factory spring is 9 pounds)

For Use in:
    457, 645, 745, 4505, 4506, 4516, 4516-1, 4526, 4536, 4546,
    4556, 4566, 4567, 4576, 4586, 4596,
    1006, 1026, 1066, 1076, 1086,
    4013, 4014, 4053, 4054

Extractor spring - 18 pounds (factory spring is 17 pounds)

For Use in:
    469, 669, 6904, 6906, 6924, 6926, 6944, 6946, 3913, 3914

Magazine catch springs for Smith & Wesson pistols. Fits all numbered series pistols except .22 caliber pistols, M&P, & Sigma pistols.

SERVICE PAK TYPE I  For Smith & Wesson Centerfire Numbered Series Semi-Automatic Pistols (Gen 1 thru Gen 3) contains the following springs to replace weakened or broken springs, returning the pistol to original factory condition:

                                        ** For models with Adjustable Rear Sights only
 

SERVICE PAK TYPE II contains all springs described in Type I pak above and a +5% extra power magazine spring.

For Use in:
    39, 439, 539, 639, 3904,3906, 3944, 909, 9mm

For full size model M&P's only. Will not fit 2.0 Compact (4 inch) models. May fit other barrels of 5 and 5.25 Inch

Recoil springs are available with load-rated specifications to tailor the recoil function to individual needs. Each load-rated recoil spring includes a factory strength striker spring.
   Note: recoil springs must be used with a solid, non-captive guide rod such as the Wolff guide rod listed below. Spring will not be captive. For use with full size models only.

• Reduced Power.......: 10, 11, 12, 13, 14 & 15 Lb.
• Factory Standard.....: 16 Lb.
• Extra Power..............: 17, 18, 19, 20, 22 & 24 Lb.

For full size model M&P's only. Will not fit Compact 2.0 series. May fit other models with barrels of 5 and 5.25 Inches

Note:
   All Wolff recoil springs for the M&P series pistol must be used with Wolff guide rods available below.

Reduced Power:
Wolff Reduced power recoil calibration pak for S&W M&P (9mm, .40 S&W, .357 Sig) contains 1 each 12, 14, and 15 Lb. recoil springs. Also included are three standard power striker springs. (Stock No. 13221)

Extra Power:
Wolff Extra power recoil calibration pak for S&W M&P (9mm, .40 S&W, .357 Sig) contains 1 each 17. 19, 20, 22, and 24 Lb. recoil springs. Also included are three standard power striker springs. (Stock No. 13220)

For full size model M&P's only. Will not fit Compact 2.0 series. May fit other models with barrels of 5 and 5.25 Inches. Wolff recoil spring guide rods for M&P series pistols are the ideal companion for Wolff recoil springs above. Guide rods are solid steel, hardened to a minimum of 55-RC and now have a jet black finish that won't wear off and provides corrosion protection. Wolff guide rods provide optimum performance for Wolff recoil springs through better support and spring alignment. Permits you to keep factory recoil assembly intact.  For use with full size models only. Available as a seperate item, or with your choice of recoil spring. Please see information above on ratings.

Magazine springs are available for M&P 9mm, .40/.357, and 10mm magazines.They are +10% extra power over factory springs.  Springs are for use in the following magazines:

   9mm - 17 Rounds                                            .40/.357 - 15 Rounds
   9mm - 12 Rounds (Compact)                            .40/.357 - 10 Rounds
   9mm - 10 Rounds                                            .40/.357 - 10 Rounds (Compact)
   9mm - 10 Rounds (Compact)                             10mm Auto - 15 Rounds
 

W. C. Wolff Company offers reduced power striker springs (firing pin springs) for M&P pistols rated at 4 pounds. The factory spring is 5 pounds. This spring will help reduce trigger pull.
Warning: For competition use only - not for duty use.

For use in: Full Size M&P .45 ACP - 4.5" BBL, M&P 2.0 10mm 4.6 inch barrel

Recoil springs are available with load-rated specifications to tailor the recoil function to individual needs. Each load-rated recoil spring includes a factory strength striker spring.
These recoil springs must be used with Wolff recoil guide below.  Spring will not be captive.

• Reduced Power.......: 14 & 15 Lb.
• Factory Standard.....: 16 Lb.
• Extra Power............: 17, 19, 20, 22 & 24 Lb.

Wolff recoil spring guide rods for M&P .45 ACP & M&P 10mm 4.6 inch series full size pistols are designed specifically for Wolff recoil springs above allowing adjustment of the recoil function. Guide rods are solid steel, hardened to a minimum of 55-RC and have a jet black finish that won't wear off and provides corrosion protection. Available as guide rod alone, or  your choice of recoil spring. See spring ratings information above.

For use in full size models only - can not be used with factory recoil spring.

Magazine springs are available for the M&P series pistols in .45 caliber.  Springs are extra power to improve feeding.
  Springs for the 8 round compact and 10 round full size magazines are +10% extra power.
  Springs for the 14 round full size magazines are +5% extra power.

Extra Power magazine springs are now available for the Shield series pistols.  These springs are +5% extra power and improved feeding in magazines with weakened or damaged springs.

*Not for use in Shield Plus or Shield EZ series of pistols. Please see those specific listings
 

Extra Power magazine springs are now available for the Shield Plus series of pistols in 9mm. Wolff now offers springs the for 10, 13, and 15 round capacity magazines. These springs are +5% extra power and improved feeding in magazines with weakened or damaged springs.

For pistols chambered in 380ACP only

Extra Power magazine springs are now available for the Shield E-Z series pistols. These springs are +10% extra power and improved feeding in magazines with weakened or damaged springs.

Recoil springs are available individually with load-rated specifications to tailor the recoil function to individual needs. Each load-rated recoil spring includes a replacement factory power striker spring.

Note: Recoil springs must be used with a solid, non-captive guide rod such as the Wolff guide rod listed above. Spring will not be captive.

• Reduced Power.......:  15 & 17 Lb.
• Factory Std.............:  18 Lb
  
• Extra Power.............: 19, 20, 22 & 24 Lb.

Wolff recoil spring guide rods for Sigma pistols are the ideal companion for Wolff recoil springs. Guide rods are solid steel, hardened to a minimum of 55-RC and now have a jet black finish that won't wear off and provides corrosion protection. Wolff guide rods provide optimum performance for Wolff recoil springs through better support and spring alignment. Permits you to keep factory recoil assembly intact. Available as guide rod alone, or your choice of recoil spring. Please see spring rating information above. Fits 4 Inch Models Only.

W. C. Wolff Company offers reduced power striker springs (firing pin springs) for Sigma pistols rated at 3.5 pounds. The factory spring is 4.75 pounds. This spring will help reduce trigger pull. 
For use in all Sigma series pistols except .380. 
Warning: For competition use only - not for duty use.

Magazine springs are available in +5% extra power to assure proper feeding in pistols with weakened or broken springs.

Recoil springs are available with load-rated specifications to tailor the recoil function to individual needs. Each load-rated recoil spring includes a replacement factory power striker spring.

Note: recoil springs must be used with a solid, non-captive guide rod such as the Wolff guide rod listed below. Spring will not be captive.

Factory Ratings:  9mm - 16 Lb
                            .40 S&W - 17 Lb.

• Reduced Power.................: 12, 14 & 15 Lb.
• Factory Standard 9mm.......: 16 Lb.
• Factory Standard. .40 cal...: 17 Lb.
• Extra Power......................: 19, 20, 22 & 24 Lb.

Wolff recoil spring guide rods for Sigma pistols are the ideal companion for Wolff recoil springs above. Guide rods are solid steel, hardened to a minimum of 55-RC and now have a jet black finish that won't wear off and provides corrosion protection. Wolff guide rods provide optimum performance for Wolff recoil springs through better support and spring alignment. Permits you to keep factory recoil assembly intact. Available as guide rod alone, or with your choice of recoil spring. Please see spring rating information above.

W. C. Wolff Company offers reduced power striker springs (firing pin springs) for Sigma pistols rated at 3.5 pounds. The factory spring is 4.75 pounds. This spring will help reduce trigger pull. 
For use in all Sigma series pistols except .380.
Warning: For competition use only - not for duty use.

Recoil spring for S&W Model 61/Escort pistol. Available in extra power. improves functioning and reliability of pistol. Pak also includes a firing pin spring.