Glock G31 Magazine .357 SIG 10-Round

Glock Factory G31 Magazine

This is the genuine article—a Glock factory-original magazine engineered for reliability and durability. Built to the same exacting standards as your pistol.

Construction & Features

• Durable polymer body reinforced with full-length steel inserts for crack resistance
• Numbered witness holes for quick round-count verification
• Branded polymer baseplate for secure, professional appearance
• 10-round capacity optimized for full-sized Glock pistols

Compatibility

This magazine works seamlessly with:

• Glock G31 (.357 SIG)
• Glock G32 (.357 SIG)
• Glock G33 (.357 SIG)

Break-In Period

Glock magazines are engineered with tight tolerances for reliability. New magazines may feel stiff during loading—this is normal. We recommend:

1. Load the magazine with all but the last round
2. Allow it to sit for a few days to compress the spring
3. Cycle the magazine repeatedly from full to empty
4. Consider using a magazine loader to ease the break-in process

After this period, your magazine will function flawlessly for years of training and competition.