Bigfork, Montana manufacturer announces increased capacity Glock 19 and Glock 17 magazines with innovative over-insertion stop technology
BIGFORK, MT – October 7, 2025 – Shield Arms, a premier manufacturer of aftermarket Glock magazines and firearm accessories, today announced its DS-Series increased capacity magazines for Glock double stack 9mm pistols. The new product line includes the DS-18 magazine for Glock 19 and the DS-20 magazine for Glock 17, 34, 45, 47, and 19X models.
Increased Magazine Capacity: DS-18 and DS-20 Specifications
The Shield Arms DS-Series delivers what other aftermarket Glock magazines have never achieved: +3 round capacity increase in nearly the same footprint as factory magazines, combined with OEM-style reliability features.
DS-18 Glock 19 Magazine: 18-round capacity magazine for Glock 19 pistols, providing +3 rounds over OEM Glock factory capacity (standard 15 rounds) with only a minimal increase in overall magazine length.
DS-20 Glock 17 Magazine: 20-round capacity magazine compatible with Glock 17, Glock 34, Glock 45, Glock 47, and Glock 19X pistols, offering +3 rounds over factory Glock magazines (standard 17 rounds) with only a minimal increase in overall magazine length.
Additional magazines both smaller and larger coming in the DS-Series!
Innovative Over-Insertion Stop Technology
Both DS-Series Glock magazines feature an over-insertion stop precision-stamped directly into the steel magazine body—a critical reliability feature found in Glock factory magazines but missing in competitors aftermarket Glock magazines.
This feature ensures proper magazine seating depth, prevents over-insertion that can cause ejector damage, feeding malfunctions, and delivers factory-spec reliability. The result is an aftermarket Glock magazine that functions with the same mechanical precision as OEM magazines while providing +3 round capacity advantage.
“The DS-Series represents a breakthrough in aftermarket Glock magazine design,” said Brandon Zeider, CEO of Shield Arms. “We’ve achieved what the market has been asking for: significantly more capacity in nearly the same size as factory magazines, combined with the over-insertion stop feature that ensures OEM-level reliability. These magazines give Glock users the best of both worlds – extra rounds when it matters most, without sacrificing the profile or dependable function they expect from their pistols.”
Availability and Product Options
Shield Arms DS-Series magazines will be available soon through our Distributors and Retail Partners, internationally through our International Distributors, and on our website. Customers can purchase individual DS-18 and DS-20 magazines, or explore complete DS-Series combos and DS-Series magazine extensions for additional customization options.
Product pages and ordering information:
Shield Arms homepage
DS-Series Glock magazines
DS-Series magazine combos
DS-Series magazine extensions
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