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

Watertown, WI – September 22, 2025 –

It has long been Griffin Armament’s belief that the ideal AR-15 should have 2 simple modes – Normal and Suppressed – affording a K.I.S.S. concept optimization for use with and without suppressors, easily adjustable by tool-less means or with a tool any sportshooter or rifleman has such as a round of 5.56mm ammunition which is already used for example to remove the firing pin retaining pin from the bolt. The Griffin Adjustable AR-15 Gas Block achieves this simplicity and is a product made possible by the acquisition of two patents from MicroMoa LLC – the original manufacturers of the “Govnah gas block”.

The Griffin Adjustable AR-15 Gas Block provides normal and suppressed operation via rotationally sliding a 17-4 regulator plate from the Normal position to the Suppressed position. This regulator plate is detented by a 718 inconel spring and ceramic ball bearing, ensuring reliability under extreme operating temperatures. There are two 180° opposed sides of the regulator plate- each identifiable from the other- each side affording a normal and suppressed setting giving users the choice between two slightly different suppressed port holes in their chosen configuration. The suppressed gas ports on conventional plates are .004” apart offering two sizes, and the low back pressure plates have 2 sizes .008” apart with the exception of the .300BLK plate.

Griffin to-date has developed a total of 9 plates to address the majority of setups in the hands of end users today. Additionally, we offer 2 pre-drilled “Drill Your Own” plates with .033? starting holes to improve the ease of drilling, that allow the custom side end  user to determine and drill their preferred hole sizes for their desired results. One of the pre-drilled options has the two .096? normal (unsuppressed) operation pass through holes pre-drilled, and the other has all four holes spot-chamfered to .108? with .033” pre-drilled starter holes only, allowing end users to customize all four port sizes. Which plate you should use is a factor of your host firearm’s gas system length, its caliber, and the type of suppressor being used (conventional or low back pressure/high flow), or a combination of both for those with extensive suppressor collections.

Rather than providing a one-size fits all adjustable gas block solution, the Griffin Adjustable Gas Block is more tailored to your setup making changing settings simple without the need to remember numbers or positions. This simplistic and visual objective 2-position adjustment eliminates confusion, and allows the user to easily identify what state the rifle is in at a glance. This gas block was designed to fit underneath most rail systems on the market, accessible through the slots in the rail, and requires the use of a straight gas tube. A .625” version for pencil barrels is planned, and a future AR-10 model will utilize a normal bent gas tube.

“There are a plethora of adjustable gas block solutions on the market, but coming from a military background, we always felt they were too broad in their application, too expensive, or required modifications to the firearm to be an ideal solution for the average gun owner. I always wanted a 2 position setup, normal and suppressed, without needing to remember numbers. When you have 18 settings for example, like a one size fits all baseball cap, 16 of them never get used once you determine which setting your firearm and suppressor combination requires. Our block gets you much closer to ideal performance, while still offering the flexibility of the 2 different sides of the plate. We spent a significant amount of time on design and optimization of the manufacturing process to bring the cost to a level most people can afford – with a street price just under $100.”

– Austin – Director of Product Development – Griffin Armament

Key Points:

– 17-4 H900 Heat Treated Stainless Steel Regulator Plate (User’s choice based on setup)

– 32RC hardened, Black Oxide Finished 416R Barrel-Quality Steel Block

– .750” Gas Block Diameter with Mil-Spec Tolerances of Gas Tube and Barrel diameters

– Low Profile Design – Fits Under Most Rails

– STD .460 knurled cup point set screw spacing

– Pre-Drilled for ease of barrel pin installation

– Includes all required pins and fasteners

– Perpetual Lifetime Warranty™

Specs:

– Weight: 1.8 oz

– MSRP: $102.95 (Includes User’s Choice of Regulator Plate)

– Additional Regulator Plates can be purchased for $34.95

– The Adjustable Gas Block will be offered as an optional $45 Upgrade for Complete Griffin Armament uppers, and Griffin Armament Rifle Builds

To find out more on Griffin Armament’s entire product line, please visit our website at www.GriffinArmament.com.

For attendees of the 2026 SHOT Show, Griffin Armament will be exhibiting the Griffin Adjustable Gas Block along with the rest of their product line at Booth # 20455.