Handgun MagazinesArredondoSold by Brownells

Arredondo

Extended Base Pad For GlockA(R) - Plus 5 Base Pad W/Spring Fits GlockA(R) 20/21, Black

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

Two-piece Synthetic

Base pad increases cartridge capacity

Impact-resistant Pad

Locks securely to the magazine

Removes Quickly

The supplied compression tool

Includes Wolff

10% extra power spring for

Checkered Bottom

Panel supports positive, non-slip magazine

$54.99
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SKU: 100001344

Overview

Built for Glock magazine users who want added capacity in a competition or range setup, this base pad is designed to extend pre-ban magazines while maintaining the original magazine body’s function. The two-piece synthetic design locks in place and can be removed with the supplied compression tool, making installation and service straightforward. A Wolff 10% extra-power spring is included to support feeding, and the checkered bottom panel gives a more secure grip during magazine changes. It adds +5 rounds in 10 mm and +4 in .45 ACP, and is listed as USPSA Limited legal.

Why Hunters Choose the Arredondo

Increases Cartridge

Capacity for pre-ban Glock magazines

Includes Wolff

10% extra power spring for

Impact-resistant Pad

Locks securely to the magazine

Removes Quickly

The supplied compression tool

Checkered Bottom

Panel supports positive, non-slip magazine

Key Features

  • Two-piece synthetic base pad increases cartridge capacity for pre-ban Glock magazines.
  • Impact-resistant pad locks securely to the magazine body.
  • Removes quickly and easily with the supplied compression tool.
  • Includes a Wolff 10% extra power spring for reliable feeding.
  • Checkered bottom panel supports positive, non-slip magazine changes.
  • Plus 5 extends pre-ban magazines to 140mm.
  • USPSA Limited legal according to the product description.

Best Used For

  • Hunters using Glock 20 or 21 magazines who need increased capacity for range work or competition.
  • Users wanting a removable magazine base pad with included compression tool for quicker maintenance.
  • Shooters who prefer a checkered bottom panel for more secure magazine handling during reloads.
  • Those seeking a magazine extension that adds capacity while remaining USPSA Limited legal.
  • Owners of pre-ban Glock magazines needing a two-piece synthetic base pad and extra-power spring.

Pros

  • Increases cartridge capacity for pre-ban Glock magazines
  • Includes Wolff 10% extra power spring for feeding support
  • Impact-resistant pad locks securely to the magazine body
  • Removes quickly with the supplied compression tool
  • Checkered bottom panel supports positive, non-slip magazine changes
  • Extends pre-ban magazines to 140mm and USPSA Limited legal

Considerations & Trade-offs

  • Designed specifically for pre-ban Glock magazines, so it is not a universal capacity solution.
  • The +5 / +4 capacity increase comes with a 140mm extension, which may matter for users working within division or length constraints.
  • It is a two-piece base pad setup that requires the supplied compression tool for removal, adding a bit of complexity compared with simpler magazine accessories.
  • The included extra-power spring is intended to support feeding with the added capacity, so this is a magazine modification rather than a drop-in cosmetic part.

Suggested Comparisons

  • Magazine base pads
  • Extended-capacity magazine accessories
  • Replacement magazine springs
  • Competition shooting magazine accessories

Suggested Accessories

  • Magazine loader
  • Magazine pouch
  • Cleaning kit
  • Bench block

Frequently Asked Questions

What Glock magazines does this base pad fit?

It fits Glock 20/21 magazines, according to the product data.

How much capacity does it add?

The product states it adds +5 rounds to 10 mm and +4 rounds to .45 ACP pre-ban magazines.

Does it include a spring?

Yes. The description says it includes a Wolff 10% extra power spring.

How is the base pad removed for maintenance or setup changes?

It removes quickly and easily with the supplied compression tool.

Is this magazine extension legal for USPSA Limited?

The product data states it is USPSA Limited legal.