CM7S .458 SOCOM XL 12.5″ SBR / Pistol

Purpose-Built 458 SOCOM Short Barreled Rifle

The Chattahoochee Munitions CM7S .458 SOCOM XL 12.5″ is a compact, purpose-built 458 SOCOM Short Barreled Rifle designed around extremely heavy .458-caliber projectiles, suppressed shooting, and the expanded cartridge overall length of .458 SOCOM XL. It is also available in a pistol configuration with a Tailhook brace in place of the buttstock.

Built on our CM7S short-action bolt-action platform, .458 SOCOM XL takes the capabilities of traditional .458 SOCOM beyond the cartridge overall-length limitations of the AR-15 platform.

At the heart of this 458 SOCOM Short Barreled Rifle is a compact 12.5-inch barrel with a fast 1:10 twist rate, providing the rotational stability required for the exceptionally heavy projectiles the cartridge is capable of utilizing.

The 12.5-inch barrel and compact CM7S platform make this configuration particularly well suited to suppressed applications where minimizing overall system length is a priority.

Why Choose a 458 SOCOM Short Barreled Rifle?

Traditional .458 SOCOM was developed around the AR-15 platform. While it provides impressive large-bore capability from an AR-15, the platform imposes significant restrictions on cartridge overall length.

.458 SOCOM XL moves beyond those limitations.

By utilizing the CM7S short-action platform and AICS-pattern magazine architecture, this 458 SOCOM Short Barreled Rifle provides additional cartridge overall length for loading long, heavy .458-caliber projectiles.

The 12.5-inch barrel creates an exceptionally compact large-bore bolt-action platform. For shooters intending to add a suppressor, reducing barrel length helps control the overall length of the complete suppressed system.

12.5″ Barrel with 1:10 Twist

The CM7S .458 SOCOM XL features a 12.5-inch barrel with a fast 1:10 twist rate in collaboration with MosTek.

Projectile stabilization becomes increasingly important as projectile weight and length increase. The 1:10 twist used in this 458 SOCOM Short Barreled Rifle is specifically selected around the heavy-projectile capabilities of .458 SOCOM XL.

The 12.5-inch barrel provides excellent maneuverability and keeps the overall platform compact, particularly when paired with a suppressor.

Combined with the compact CM7S action, the result is a specialized large-bore bolt-action firearm engineered around heavy-projectile, subsonic, and suppressed applications.

Short Barreled Rifle or Pistol Configuration

The CM7S .458 SOCOM XL 12.5″ is available in your choice of Short Barreled Rifle (SBR) or pistol configuration.

The Short Barreled Rifle configuration is equipped with a buttstock.

The pistol configuration substitutes a Tailhook pistol brace for the buttstock.

Both configurations retain the same purpose-built CM7S action, 12.5-inch 1:10 twist barrel, TriggerTech Primary trigger, and modified MDT metal magazine system.

This gives customers the ability to select the configuration that best fits their intended use while retaining the core performance characteristics of the CM7S .458 SOCOM XL platform.

TriggerTech Primary Trigger

The CM7S comes standard with a TriggerTech Primary Remington 700 trigger, providing a clean, consistent break that complements the accuracy-focused CM7S platform.

Each trigger is set at approximately 1.5 pounds and is available with your choice of a flat or curved trigger shoe.

The predictable break of the TriggerTech Primary provides excellent trigger control and complements the inherent stability and accuracy of the CM7S bolt-action platform.

Built Around .458 SOCOM XL

Traditional .458 SOCOM is constrained by the cartridge dimensions necessary to function within the AR-15 platform.

.458 SOCOM XL utilizes the additional room available in the CM7S short-action platform to increase usable cartridge overall length. That additional length creates considerably more flexibility when working with long, heavy .458-caliber projectiles.

For shooters considering a 458 SOCOM Short Barreled Rifle specifically for heavy-projectile and suppressed applications, the CM7S provides a platform engineered around those capabilities from the beginning.

Rather than simply putting a shorter barrel on a conventional .458 SOCOM bolt action, Chattahoochee Munitions developed the CM7S configuration around the expanded capabilities of .458 SOCOM XL.

Modified MDT Metal Magazine System

A cartridge as large as .458 SOCOM XL requires a magazine configured specifically around its dimensions.

The CM7S uses genuine MDT metal AICS-pattern magazines modified by Chattahoochee Munitions for .458 SOCOM XL. These modifications provide the cartridge clearance and feed geometry necessary to properly accommodate and present the oversized cartridge.

This magazine system allows the 458 SOCOM Short Barreled Rifle to take advantage of the extended cartridge overall length available in the CM7S platform.

Chattahoochee Munitions also utilizes this modified MDT magazine architecture in our CM10 semi-automatic .458 SOCOM XL platform.

Designed Around Suppressed and Subsonic Performance

Suppressed shooting is where the compact CM7S configuration really comes into its own.

Unlike a semi-automatic action, the CM7S remains mechanically locked during firing. There is no action cycling during the shot, making the bolt-action platform particularly appealing when sound reduction is a priority.

The 12.5-inch barrel also helps control the overall length of the firearm once a suppressor is installed.

Combine that compact configuration with the ability to launch exceptionally heavy .458-caliber projectiles at subsonic velocities, and the result is a highly specialized suppressed platform.

The fast 1:10 twist barrel provides the stabilization required by these heavy projectiles, while .458 SOCOM XL provides the additional cartridge overall length necessary to take advantage of projectile designs that would otherwise be constrained by AR-15 magazine dimensions.

The result is a 458 SOCOM Short Barreled Rifle engineered around the characteristics that make heavy subsonic cartridges so unique, with the additional option of choosing a pistol configuration.

Key Features

• Chattahoochee Munitions CM7S bolt-action platform
• Chambered in .458 SOCOM XL
• 12.5-inch barrel
• Fast 1:10 twist rate
• Choice of Short Barreled Rifle or pistol configuration
• Buttstock on Short Barreled Rifle configuration
• Tailhook brace on pistol configuration
• TriggerTech Primary Remington 700 trigger
• Flat or curved trigger shoe option
• Trigger pull set at approximately 1.5 lb
• Short-action architecture
• Designed around extremely heavy .458-caliber projectiles
• Genuine MDT metal magazine modified by Chattahoochee Munitions
• AICS-pattern magazine architecture
• Extended cartridge overall-length capability
• Compact configuration for suppressed applications
• Purpose-built for suppressed and subsonic use
• Manufactured and assembled by Chattahoochee Munitions

Specifications

• Caliber: .458 SOCOM XL
• Platform: CM7S Bolt Action
• Barrel Length: 12.5″
• Twist Rate: 1:10
• Configuration: Short Barreled Rifle (SBR) or Pistol
• SBR Configuration: Buttstock
• Pistol Configuration: Tailhook Brace
• Trigger: TriggerTech Primary Remington 700
• Trigger Shoe: Flat or Curved
• Trigger Pull: Set at approximately 1.5 lb
• Magazine: Modified MDT Metal AICS-Pattern Magazine

Who Is the CM7S .458 SOCOM XL 12.5″ For?

The CM7S isn’t intended to be another conventional bolt-action firearm.

It is designed for shooters specifically interested in the capabilities of large-diameter, extremely heavy projectiles in a compact platform.

If you’re looking for a 458 SOCOM Short Barreled Rifle that moves beyond the dimensional restrictions of AR-15-based .458 SOCOM, the CM7S provides a platform engineered specifically around that objective.

From the compact 12.5-inch fast-twist barrel and TriggerTech Primary trigger to the modified MDT magazine system, the firearm is built around the cartridge rather than treating .458 SOCOM XL as an afterthought.

FAQ

What is a 458 SOCOM Short Barreled Rifle?

A 458 SOCOM Short Barreled Rifle is a rifle chambered around the .458 SOCOM cartridge family with a barrel shorter than 16 inches. The CM7S is chambered in .458 SOCOM XL and uses a 12.5-inch barrel to create an exceptionally compact large-bore bolt-action platform.

Can I order the CM7S 12.5″ as a pistol instead?

Yes. The CM7S .458 SOCOM XL 12.5″ can be selected as either a Short Barreled Rifle with a buttstock or a pistol equipped with a Tailhook brace.

What is .458 SOCOM XL?

.458 SOCOM XL takes the .458 SOCOM concept beyond the cartridge overall-length restrictions imposed by the AR-15 platform. The additional space available in the CM7S short-action platform provides greater flexibility when loading long, heavy .458-caliber projectiles.

What is the barrel length and twist rate?

The CM7S features a 12.5-inch barrel with a 1:10 twist rate. The fast twist is selected to provide the rotational stability required by the exceptionally heavy projectiles that can be used with .458 SOCOM XL.

What trigger does the CM7S use?

The CM7S comes standard with a TriggerTech Primary Remington 700 trigger set at approximately 1.5 pounds, with your choice of a flat or curved trigger shoe.

What magazines does the CM7S use?

The CM7S uses genuine MDT metal AICS-pattern magazines modified by Chattahoochee Munitions specifically to accommodate and feed .458 SOCOM XL.

Is the CM7S .458 SOCOM XL designed for suppressed shooting?

Yes. The compact 12.5-inch barrel, bolt-action operating system, fast 1:10 twist rate, and ability to utilize extremely heavy .458-caliber projectiles make the CM7S particularly well suited to suppressed and subsonic applications.

Is the Short Barreled Rifle configuration subject to NFA requirements?

Yes. The configuration equipped with a buttstock and 12.5-inch barrel is a Short Barreled Rifle (SBR) and is subject to applicable NFA requirements. A pistol configuration equipped with a Tailhook brace is also available. Customers are responsible for compliance with applicable federal, state, and local laws.