338 ARC Bolt Action Magazine – 10-Round MDT Polymer AICS Magazine

The 338 ARC Bolt Action Magazine from Chattahoochee Munitions is a 10-round MDT polymer AICS-pattern magazine tested and vetted for reliable use with 338 ARC in our CM7S bolt-action platform.

Originally designed around the 6 ARC cartridge family, this magazine has been tested by Chattahoochee Munitions with 338 ARC, 6 ARC, and 22 ARC. Its compatibility across the ARC family makes it the magazine we supply with our CM7S 338 ARC rifles and barreled-action systems.

Rather than leaving magazine selection to the customer, Chattahoochee Munitions tests magazine compatibility as part of the complete firearm system.

Tested 338 ARC Magazine Compatibility

Reliable feeding is especially important when adapting cartridges with different case and projectile geometries to an AICS-pattern magazine system.

Chattahoochee Munitions has tested this 338 ARC Bolt Action Magazine with:

• 338 ARC
• 6 ARC
• 22 ARC

This is the same magazine configuration we use with our CM7S 338 ARC rifles.

MDT Polymer Construction

This magazine uses a durable polymer body, not a metal magazine body. Polymer construction keeps the magazine lightweight while providing the geometry required for the ARC-family cartridges we have tested.

The magazine holds 10 rounds and is designed for compatible AICS-pattern magazine wells.

Designed for the CM7S 338 ARC System

Our CM7S 338 ARC rifles use an AICS-pattern magazine system. Chattahoochee Munitions pairs the platform with this magazine because we have tested the combination rather than relying solely on nominal cartridge compatibility.

Each CM7S 338 ARC firearm includes a vetted magazine, providing the customer with a known starting configuration rather than requiring experimentation with aftermarket magazines.

For complete rifles, barreled actions, magazines, and other current 338 ARC products, visit Containment Zone 338.

Specifications

• Product: MDT Polymer AICS-Pattern Magazine
• Capacity: 10 rounds
• Construction: Polymer
• Magazine Pattern: AICS
• CM-Tested Cartridges: 338 ARC, 6 ARC, 22 ARC
• CM Application: CM7S 338 ARC bolt-action rifles and compatible CM7S systems

Why Chattahoochee Munitions Uses This Magazine for 338 ARC

The 338 ARC Bolt Action Magazine used by Chattahoochee Munitions starts with MDT’s polymer AICS-pattern magazine designed for the ARC cartridge family. MDT identifies a dedicated 6mm ARC magazine within its short-action magazine compatibility system. You can review MDT’s magazine compatibility information here.

Chattahoochee Munitions goes beyond published compatibility by testing the magazine with the cartridges and firearm systems we actually build. We have verified this magazine with 338 ARC, 6 ARC, and 22 ARC, which is why it is the magazine supplied with our CM7S 338 ARC rifles.

That distinction matters. A magazine may share the correct general dimensions while still producing differences in feeding based on cartridge geometry, projectile profile, and firearm configuration. Our goal is to provide customers with a magazine that has already been evaluated as part of the complete CM7S system rather than requiring them to determine compatibility after purchasing the rifle.

A Vetted Magazine for a Complete 338 ARC System

Chattahoochee Munitions approaches the magazine as part of the firearm system rather than as an unrelated accessory. The CM7S uses a 6.5 Grendel Type II bolt face and an AICS-pattern magazine architecture selected around the ARC cartridge family. Pairing the action, chamber, and magazine around known-compatible components helps provide a consistent starting point for the customer.

Customers purchasing a complete CM7S 338 ARC firearm receive a tested magazine with the rifle. Additional magazines are available here for shooters who want spares while maintaining the same magazine configuration used and vetted by Chattahoochee Munitions.

To see the complete lineup of CM7S and CM15 rifles, barreled actions, and magazines chambered for 338 ARC, visit Containment Zone 338.

338 ARC Bolt Action Magazine FAQ

What magazine does the CM7S 338 ARC use?

Chattahoochee Munitions uses a 10-round MDT polymer AICS-pattern magazine with the CM7S 338 ARC. The magazine has been tested by CM with 338 ARC before being selected for the platform.

Is this a metal magazine?

No. This 338 ARC Bolt Action Magazine is polymer.

Has this magazine been tested with 338 ARC?

Yes. Chattahoochee Munitions has tested this magazine with 338 ARC as part of the CM7S platform.

Does this magazine work with other ARC cartridges?

Chattahoochee Munitions has tested the magazine with 22 ARC, 6 ARC, and 338 ARC.

Does a CM7S 338 ARC rifle include a magazine?

Yes. Chattahoochee Munitions supplies a tested and vetted magazine with its CM7S 338 ARC firearms so customers receive a known compatible magazine with the rifle.