This is an extended 31-round magazine for Glock pistols chambered in .40 S&W
Get the ultimate in high-capacity, .40 S&W Glock magazines from the leader in aftermarket parts and accessories, SGM Tactical.
Featuring a full 31-round capacity and durable polymer construction—with the same reinforced feed lips, steel inserts and witness holes you’ll find in a stock Glock magazine—SGM Tactical’s can withstand extreme conditions and feed your pistol more reliably than any other aftermarket magazine available today. And it comes with a 5-year warranty.
Note: Extended magazines can come with especially stiff springs. Try loading half the listed capacity and leaving the magazine overnight to ensure easier loading in the future (or use a speedloader).