Magazines & Extensions
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Enhance your 5.56 setup with magazines and magazine couplers designed around capacity, visibility, and ammunition-status awareness. The category includes a standard 30-round polymer magazine, two magazine models with built-in ammunition indicators, and two coupler options for compatible setups.
MAG provides a straightforward 30-round configuration, while MAG17 adds transparent side windows and a full-magazine indicator. CDMAG uses numbered and color-coded indicators to display ammunition status. MC16N and MCD16N provide coupling options for compatible magazine configurations.
Different designs put round status and magazine configuration directly into the hardware.
5.56 Magazines and Magazine Couplers
The current selection centers on three 5.56 magazine designs and two magazine couplers.
The MAG is the straightforward option: a 30-round polymer magazine for 5.56×45 ammunition.
The MAG17 keeps the same 30-round format but adds transparent side windows for viewing ammunition status. A spring-loaded pin at the base provides a separate indication when the magazine is fully loaded.
The CDMAG takes a different approach. Instead of side windows, it uses colored and numbered indicators at the rear and base of the magazine.
For magazine pairing, the lineup also includes the MC16N and MCD16N couplers.
Standard and Counting Magazines
MAG 5.56 Magazine
The MAG uses a conventional 30-round polymer design for 5.56×45 ammunition.
Its current product listing identifies a stainless-steel spring and names the MCD16N as a compatible magazine coupler. For a standard magazine without an ammunition-status display, MAG is the simplest configuration in the lineup.
MAG17 Counting Magazine
The MAG17 adds visual ammunition-status features without changing the basic 30-round format.
Transparent windows along the magazine body provide a view of the remaining ammunition, while a spring-loaded pin at the base indicates when the magazine is full. The current listing specifies 30 rounds of 5.56×45 (.223) and impact-resistant polymer construction.
This makes MAG17 distinct from a conventional closed-body magazine without relying on an electronic counting system.
CDMAG Counting Magazine
The CDMAG uses a rear-and-base indicator system instead of transparent side windows.
Its color zones divide ammunition status into three ranges:
● Green: 30–21 rounds
● Yellow: 20–11 rounds
● Red: 10–0 rounds
The rear display combines color and numbered indicators, while the base indicator allows the magazine's status to be identified from below. The current 2026 catalog identifies CDMAG as a 30-round polymer magazine for M16-style applications.
MAG17 vs. CDMAG
MAG17 and CDMAG both provide ammunition-status information, but they do it differently.
MAG17 relies on transparent side windows plus a full-magazine indicator at the base.
CDMAG uses numbered and color-coded indicators at the rear and base, making its round-status system part of the magazine's external display rather than a viewing window.
For buyers specifically looking for a counting magazine, this indicator design is the main distinction between the two models.
Magazine Couplers
The MC16N is listed as a magazine coupler for M16/AR15 applications.
The MCD16N is a separate coupler model. The MAG product page specifically identifies MCD16N as a compatible coupler for the MAG magazine.
Because the current product pages do not clearly document every magazine body supported by both couplers, compatibility should not be assumed across the two models.
Magazine Models at a Glance
| Model | Product Type | Caliber / Application | Capacity / Magazine Compatibility | Key Feature |
|---|---|---|---|---|
| MAG | Magazine | 5.56×45 | 30 rounds | Polymer magazine with stainless-steel spring |
| MAG17 | Counting magazine | 5.56×45 (.223) | 30 rounds | Transparent side windows and full-magazine indicator |
| CDMAG | Counting magazine | 5.56 mm / M16-style applications | 30 rounds | Numbered and color-coded ammunition-status indicators |
| MC16N | Magazine coupler | AR15 / M16 aluminum magazines | Joins two AR15/M16 aluminum magazines | Two removable pouch pulls and three adjustment screws |
| MCD16N | Magazine coupler | 5.56×45 polymer magazines | Joins two 5.56×45 polymer magazines | Staggered magazine positioning, wide-gap design, and captive screws |
Related Products
Magazine FAQs
What is the difference between MAG, CDMAG, and MAG17?
MAG is the standard 30-round polymer magazine. MAG17 adds transparent side windows and a full-magazine indicator, while CDMAG uses colored and numbered indicators to show ammunition status.
What is a counting magazine?
A counting magazine provides a visible indication of ammunition status. MAG17 uses transparent viewing windows and a full-magazine indicator, while CDMAG uses numbered and color-coded indicators.
What is the difference between MC16N and MCD16N?
MC16N and MCD16N are separate magazine coupler models. MC16N is listed for M16/AR15 applications, while the MAG product page specifically identifies MCD16N as a compatible coupler for the MAG magazine.
What caliber are MAG, MAG17, and CDMAG designed for?
MAG and MAG17 are specified for 5.56×45 ammunition. CDMAG is listed as a 5.56 mm, 30-round M16-style magazine.
Does magazine compatibility depend only on caliber?
No. A magazine also has to match the firearm's magazine interface and intended platform. The products in this range are rifle-pattern magazines and couplers, so caliber alone does not establish compatibility.
