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2011 140mm 23rd Slidelock Magazines 9mm - 2011 140mm 21rd Ss Slidelock Magazine Base Pad Ss 9mm
Our editorial team reviews specifications, product data, and field-use information to keep pages accurate.
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SKU: 430103622
Overview
Built for high-capacity 2011 platforms, this 140mm magazine is intended for shooters who want a 9mm option with 21-round capacity in a modular double-stack setup. Atlas Gunworks describes revised internal and upper tube dimensions, along with a proper follower, as part of the design aimed at improving feeding and lockback in compatible 2011-style pistols. It is listed for use with modular grip double stacks in 9mm, .38 Super, and .38 Super Comp, making it a focused choice for range work or competition-oriented setups. Available in stainless steel or black DLC coated stainless steel, it offers a practical finish choice without changing the magazine’s core purpose.
Why Hunters Choose the Atlas Gunworks
High-capacity 2011
Platforms in 9mm, .38 Super,
140mm Magazine
Capacity holds 21 rounds
New Internal
Dimensions are intended to improve
Upper Tube
Dimensions and follower are designed
Available Stainless
Steel or black DLC coated
Key Features
- Atlas Gunworks Perfect Feed 9mm HiCap magazine for 2011 platforms.
- 140mm magazine capacity: 21 rounds.
- Designed for modular grip double-stack pistols in 9mm, .38 Super, and .38 Super Comp.
- New internal dimensions are intended to improve feeding in double-stack 2011s.
- Proper follower and upper tube dimensions support reliable lockback.
- Available in stainless steel and black DLC coated stainless steel.
Best Used For
- 2011 shooters using modular grip double stacks in 9mm, .38 Super, or .38 Super Comp
- Range users needing a 140mm magazine with 21-round capacity for compatible 2011 platforms
- Owners seeking a redesigned magazine body with proper follower and reliable lockback
- Shooters who prefer stainless steel or black DLC coated stainless steel magazine options
Specifications
| Body | redesigned, dimensionally correct magazine body |
|---|---|
| Caliber | 9mm |
| Compatible Calibers | 9mm, .38 super, .38 super comp |
| Feed | new internal dimensions greatly improve feeding |
| Follower | proper follower |
| Lockback | reliable lockback achievable |
| Magazine Capacity | 21 rounds |
| Magazine Length | 140mm |
| Material Options | stainless steel; black DLC coated stainless steel |
| Platform Compatibility | high capacity 2011 platforms; all modular grip double stacks |
| Spring | +18% spring |
Pros
- Designed for high-capacity 2011 platforms in 9mm, .38 Super, and .38 Super Comp.
- 140mm magazine capacity holds 21 rounds.
- New internal dimensions are intended to improve feeding in double-stack 2011s.
- Upper tube dimensions and follower are designed to support reliable lockback.
- Available in stainless steel or black DLC coated stainless steel.
- +18% spring is specified for reliable feed and lockback.
Considerations & Trade-offs
- 140mm configuration is listed at 21 rounds, so capacity is tied to the magazine format rather than offering the highest possible round count for every setup.
- Designed for modular grip double-stack 2011 platforms in 9mm, .38 Super, and .38 Super Comp, so compatibility is specific rather than universal across all handguns.
- Available in stainless steel and black DLC coated stainless steel, but finish selection may affect appearance and maintenance preferences rather than function.
- The product emphasizes improved feeding and lockback through revised internal dimensions and a +18% spring, but final performance still depends on the host pistol and setup.
Suggested Comparisons
- 2011 platform magazines
- High-capacity pistol magazines
- 9mm pistol magazines
- .38 Super / .38 Super Comp magazines
Suggested Accessories
- 2011 modular grip double-stack magazine pouch
- Magazine loader
- Cleaning brush
- Spare magazine spring
Frequently Asked Questions
What platform is this magazine designed for?
It is designed for high-capacity 2011 platforms and is stated to work with all modular grip double stacks in 9mm, .38 Super, and .38 Super Comp.
How many rounds does the 140mm magazine hold?
The 140mm magazine capacity is listed as 21 rounds.
What finish options are available?
The product is available in stainless steel and black DLC coated stainless steel.
What features are highlighted for feeding and lockback?
The description says the magazine has new internal dimensions, a redesigned dimensionally correct body, an upper tube dimension paired with a proper follower, and a +18% spring to support feeding and lockback.
Is this magazine only for 9mm?
It is described as a high-capacity 9mm magazine, and it is also stated to work with modular grip double stacks in .38 Super and .38 Super Comp.