Shield Arms Magazine Extension +5/+4 for Glock 17/22/34/35/19X/45 Black

The Shield Arms Magazine Extension +5/+4 for Glock 17/22/34/35/19X/45 Black is a proven capacity boost accessory that adds 5 rounds to full-size Glock magazines (17, 19X, 34, 45) and 4 rounds to .40 S&W variants (22, 35). This black polymer extension mounts securely to standard Glock magazine bodies, allowing operators to increase round count without sacrificing the ergonomics or reliability of their platform.

The defining feature is the easy-access floor plate design, which allows shooters to service, clean, or perform maintenance on the magazine spring and follower assembly without removing the extension itself. This translates to faster field maintenance during training cycles or operational breaks. The extension maintains the same outer profile as standard Glock magazines, preserving holster compatibility while extending the magazine body length by approximately 1 inch vertically. Construction remains lightweight at 0.14 lbs, adding negligible weight to loaded magazines.

This accessory is suited for law enforcement duty cycles, patrol rifle backup magazines, civilian defensive carry with full-size platforms, and competition shooters requiring additional capacity per stage. Users who train regularly with Glock duty guns or maintain multiple magazine sets benefit from the straightforward installation and the ability to upgrade magazine capacity across their inventory without purchasing new magazines. The extension works across both 9mm and .40 S&W full-size Glock lineups, offering platform flexibility.

Magazine extensions are standard upgrades within the Glock aftermarket ecosystem, allowing shooters to extract additional capacity from their existing magazines. Shield Arms is recognized within the Glock accessory market for precision-fit products that function reliably across full-size and compact platforms.