DS20 Magazine for Glock 17

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Key Features

• 20-round capacity - +3 rounds over Glock OEM magazines
• Near-OEM footprint - Minimal size increase for concealment
• Over-insertion stop - First aftermarket Glock mag with this feature
• Premium steel construction - Built for reliability and durability
• Made in USA - Manufactured in Bigfork, Montana

Compatible With

• Glock 17
• Glock 34
• Glock 45
• Glock 47
• Glock 19X
• Glock 19
• Glock 26

Maximum Capacity in a Compact Package

The Shield Arms DS20 magazine revolutionizes aftermarket Glock 17 magazines by delivering 20 rounds of 9mm ammunition in nearly the same footprint as factory 17-round Glock magazines. This breakthrough design gives Glock 17 owners +3 rounds of additional capacity without the bulk typically associated with extended magazines.

Whether you carry your Glock 17 for concealed carry, home defense, duty use, or competitive shooting, the DS-20 provides crucial extra capacity while maintaining the compact profile that makes the Glock 17 one of the most popular handguns in the world.

Engineering Excellence: Over-Insertion Stop Technology

Shield Arms brings OEM-level over-insertion protection to aftermarket Glock magazines with the DS-20's integrated over-insertion stop. 

Why the Over-Insertion Stop Matters

The over-insertion stop is a critical reliability feature that:

• Ensures proper seating depth - Prevents the magazine from being inserted too far into the magazine well
• Eliminates feeding malfunctions - Maintains correct ammunition presentation to the feed ramp
• Provides consistent lockup - Ensures the magazine catch engages properly every time
• Delivers OEM reliability - Functions with the same mechanical precision as Glock factory magazines