Genuine factory GLOCK Gen 4 Extended Capacity magazine designed to work with all previous and current generation Glock pistols. Glock magazines have a hardened steel insert encased in the proven Glock high-tech polymer. This resists deformation - even when dropped from great height or exposed to extreme environment conditions. The magazine has a window for each cartridge so there is no question how many rounds are loaded. The high quality spring and follower ensure reliable feeding from the first to the last shot.

9mm Compatibility: G17, G17L, G19, G19x, G26, G34, G45, G47, G48, G49.
40 S&W Compatibility: G22, G23, G24, G27, G35.

Features:
OEM GLOCK Factory Part..
Numbered witness holes. 
Durable polymer shell.
Hardened steel insert for long term reliability.
Gen4 double cut magazine body compatible with all previous generations.

Specifications:
40 S&W 22rd. Length: 165mm (6.49")
9mm 24 rd. Length: 165mm (6.49")
9mm 33 rd. Length: 211mm (8.30")
9mm Follower Color: Black
40 Cal Follower Color: Black
Capacity Indicator: Witness holes.
Magazine Material: Polymer.
Release Type: Gen 4 double cut magazine body.
Manufacturer: GLOCK Factory Original.
*Note: Extended capacity magazines are not flush-fitting.