Recoil springs for FULL SIZE MODELS are available with load rated specifications to help tailor the recoil function. Each recoil spring includes an extra power firing pin spring. NOTE: recoil spring replaces outer recoil spring only. Short buffer spring should not be changed.

• Reduced Power...: 10 Lb.
• Factory Standard.: 12 Lb. (9mm & .40 S&W)
• Factory Standard.: 14 Lb. (.45 ACP)
• Extra Power.........: 16, 18 & 20 Lb.

• Reduced Power...: 10 & 12 Lb.
• Factory Standard.: 14 Lb. (Reference Only)
• Extra Power........: 16 Lb.

Magazine springs for the H&K USP's are available in +10% extra power to improve feeding and reliability.

For use in:
         USP - 9mm, 15 rounds
         USP - .40 S&W, 13 rounds 
         USP - .45 ACP - 8 rounds (compact)

For use in:
          USP - .40 S&W - 10 rounds
          USP - .45 ACP - 10 rounds 
          USP - 9x19 (9mm) - 10 rounds

For use in:
          USP - .45ACP - 12 round Law Enforcement magazine only 

Recoil springs are available with load-rated specifications to tailor the recoil function to individual needs. Each load-rated recoil spring pak includes an extra power striker spring.

• Reduced Power...: 17, 18, 19 & 20 Lb.
• Factory Standard.: 21 Lb.
• Extra Power........: 23 & 25 Lb.

Recoil springs are available with load-rated specifications to tailor the recoil function to individual needs. Each load-rated recoil spring pak includes an extra power firing pin spring.
 

• Reduced Power...: 11 & 12 Lb.
• Factory Standard.: 13 Lb. (Reference Only)
• Extra Power.........: 16, 18 & 20 Lb.

Hammer Springs (mainsprings)

• Reduced Power...: 14, 15 & 16 Lb.
• Factory Standard.: 17 Lb. (Reference Only)
• Extra Power.........: None available

Hammer Spring Pak - reduced power.
   This pak contains 1 each of 14, 15 and 16 pound reduced power hammer springs above, allowing adjustment of the firearm to individual requirements.