OEM parts and accessories are made with the same attention to detail and quality as the ultra-reliable pistols. From firing pins to trigger springs, nothing keeps your running like OEM parts.

Glock OEM Magazine Catch Spring — SP39543 (Fits All Models Except G21SF)

The factory-original Glock magazine catch spring — the part that keeps your magazine seated and your pistol running.

If your Glock’s magazine isn’t seating with a positive click, releases too easily under recoil, or you’re replacing worn components during a frame rebuild, this is the part you need. The Glock OEM Magazine Catch Spring (SP39543) is a genuine factory replacement manufactured to the exact same specifications, tolerances, and materials as the spring your pistol shipped with. Nothing aftermarket. Nothing approximated. Factory Glock quality at $9.99 with free shipping.

This part also serves as the updated replacement for the legacy Glock part SP00280 — the same spring, same fitment, new part number. If you’re searching for SP00280, this is your part.

Why OEM Matters for Springs

Springs are the most failure-prone components in any semi-automatic pistol — and the magazine catch spring is no exception. Over thousands of cycles of magazine insertions and releases, the spring fatigues, weakens, or deforms. When it does, magazines may:

  • Fail to seat fully on insertion

  • Drop free unexpectedly under recoil

  • Require excessive force to release during a reload

  • Not lock positively in the well, causing feeding malfunctions

An OEM replacement spring restores the precise tension Glock engineered into your pistol from day one. No guessing on spring rates. No fitment issues. Drop it in and trust it.

Warning WARNING: This product can expose you to chemicals including lead, which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.

“GLOCK” is a federally registered trademark of GLOCK, Inc. and is one of many trademarks owned by Ges.m.b.H., Inc. Neither Aim Arms nor this site are affiliated in any manner with, or otherwise endorsed by, GLOCK, Inc. pistols, parts, or components. For genuine products and parts, visit www.glock.com.