Handgun MagazinesAtlas GunworksSold by Brownells

Atlas Gunworks

2011(R) Compatible 126mm 18rd Slidelock Magazines 9mm - 2011 126mm 18rd Ss Slidelock Magazine Base Pad Ss 9mm

Our editorial team reviews specifications, product data, and field-use information to keep pages accurate.

Atlas Gunworks

2011 126mm Slidelock 9mm magazine

Lockback Capacity:

18 rounds

Designed Work

All modular grip double stacks

9mm Tubes

.38 Super and .38 Super

Redesigned, Dimensionally

Correct mag body

$99.99
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SKU: 430103620

Overview

Built for 2011-pattern pistols, this 126mm slidelock magazine is intended for shooters who want a dedicated 9mm option with an 18-round lockback capacity. Atlas Gunworks pairs redesigned internal and upper tube dimensions with a premium follower and +18% spring to support feeding and slide lockback in modular grip double stacks. The 9mm tube is also listed as compatible with .38 Super and .38 Super Comp, giving it added flexibility for range use or match setups. Its discrete 4mm basepad keeps the profile restrained while staying within the magazine’s purpose-driven design.

Why Hunters Choose the Atlas Gunworks

New Internal

Dimensions are designed to improve

Upper Tube

Dimensions and follower support reliable

Compatible 9mm,

9mm, .38 Super, and .38

Use All

Modular grip double stacks

Lockback Capacity

Is 18 rounds

Key Features

  • Atlas Gunworks 2011 126mm Slidelock 9mm magazine
  • Lockback capacity: 18 rounds
  • Designed to work with all modular grip double stacks
  • 9mm tubes also work with .38 Super and .38 Super Comp
  • Redesigned, dimensionally correct mag body
  • Includes a discrete premium 4mm basepad

Best Used For

  • 2011 owners needing 126mm magazines with lockback capacity for range or match use
  • Shooters using modular grip double stacks who want a magazine designed to work with them
  • Users loading 9mm, or .38 Super and .38 Super Comp in compatible 2011 platforms
  • Hunters and competitors wanting a discreet 4mm basepad and 18-round capacity
  • Owners prioritizing a redesigned magazine body with a premium follower and +18% spring

Pros

  • New internal dimensions are designed to improve feeding in 2011 pistols.
  • Upper tube dimensions and follower support reliable lockback.
  • Compatible with 9mm, .38 Super, and .38 Super Comp.
  • Designed for use with all modular grip double stacks.
  • Lockback capacity is 18 rounds.
  • Includes a discrete premium 4mm basepad.

Considerations & Trade-offs

  • Designed around 2011 126mm slidelock use, so fit and function are specific to compatible modular grip double-stack pistols rather than a broad universal application.
  • The 18-round lockback capacity is tied to the magazine’s slidelock configuration, which may be a trade-off for users prioritizing maximum capacity over lockback capability.
  • The product is described as working with 9mm, .38 Super, and .38 Super Comp, but it remains a magazine-specific solution rather than a caliber-convertible system.
  • The discrete 4mm basepad and redesigned mag body are part of the package, which may matter for users who prefer a different basepad profile or magazine setup.

Suggested Comparisons

  • 2011 pistol magazines
  • 9mm magazines
  • .38 Super magazines
  • modular grip double-stack magazines

Suggested Accessories

  • Magazine pouch
  • Speed loader
  • Cleaning brush
  • Range bag

Frequently Asked Questions

What pistols is this magazine intended for?

It is described as a 2011-compatible 126mm Slidelock magazine designed to work with all modular grip double stacks.

What is the capacity?

The listed lockback capacity is 18 rounds.

Can it be used with calibers other than 9mm?

The product data says the 9mm tubes work with .38 Super and .38 Super Comp.

What features are listed to support feeding and lockback?

The source lists new internal dimensions, new upper tube dimensions, a proper follower, a redesigned mag body, and a +18% spring for reliable feed and lockback.

Does it include a base pad?

Yes. The description says it has a discrete premium 4mm basepad.