GLOCK Inc. is voluntarily exchanging the recoil spring assembly (RSA) on its new Gen4 pistols (with the exception of G26 and G27 models). GLOCK has developed a new design to the recoil spring assemblies on its Gen4 pistols to replace several variations that are functioning in the market today. As part of the company’s commitment to perfection, we are voluntarily exchanging the existing RSA in order to ensure our products perform up to GLOCK’s stringent standards.

GLOCK is replacing the RSA in all Gen4s sold before July 22, 2011 at no cost. Please complete the following procedure to receive a new RSA. The RSA can safely and simply be swapped out using normal field stripping protocols. If you have additional questions, please contact GLOCK at 1-877-745-8523 with your serial number and model number.


  1. Call 1-877-745-8523 with your serial number and model number to request your modified RSA. GLOCK will verify your serial number and collect shipping information
  2. Within 30 days, GLOCK will send you a replacement RSA along with a pre-addressed envelope to mail in your old spring
  3. Ensure your Gen4 is completely unloaded
  4. Field strip your GLOCK per the instructions found in your ‘Instructions for Use’ manual that came with your pistol and replace the old RSA with the new one
  5. Place the old RSA in the supplied shipping container and give to the United States Postal Service (USPS)
Glock Recoil Spring Assembly ID Chart

Glock Recoil Spring Assembly ID Chart



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