Arizona Gun Runners a Law Enforcement Wholesale Distributor of  Tactical Equipment and Accessories.


C-MAG twin drum high capacity ammunition magazine.

C-MAG Beta Company

Twin-drum, High Capacity ammunition magazine for rifles and light support weapons


  • Law Enforcement
  • Military
  • Civilian Market

C-MAG Beta Company


There is no further discount on Beta C Mags.




HK G36

HK 33/53








Colt 9mm




M14 mags are not available with an unknown production time


Construction and Design

The C-MAG is a twin-drum, high capacity ammunition magazine for rifles, light support weapons, firing port and other specialized weapons in 5.56mm caliber. Its main components are constructed of high impact plastic. Avoiding trouble-prone compression springs, the C-MAG utilizes a unique rotation device and low torsion stress springs which ensure positive control of each round and proper feeding. The design provides for equal distribution of the ammunition in each of the twin drums located on either side of the weapon. This results in a fixed center of gravity during firing, an important attribute during full automatic performance. The compact design allows for better ground clearance.


The C-MAG loads and functions just like standard magazines. It may be reloaded and reused repeatedly. Loading does not demand disassembly or special tools. The cartridges are loaded by pressing them into the feed aperture in the same way as a normal straight magazine. The cartridges will automatically feed alternately into each drum. Loading can be done by hand or with a choice of loading devices. The springs are tensioned during the loading operation, without the need for any supplementary operations. The magazine does not need to be empty to be loaded and remains completely operational at all times; loading may be stopped at any point, the magazine inserted into the weapon, ready for immediate operation.


The key feature of the C-MAG is the formation of the double rows ofCMAG cartridges (yellow) in each of the drums. Diagram 1 illustrates how these double rows are formed in the interior magazine. Also shown are spacer rounds (gray) and two pusher arm assemblies (blue). The solid spacer rounds (gray) occupy the feed clip when the magazine is empty (Diagram 2). The number required depends on the length and style of the feed clip, which is specific to an individual weapon system. The pusher arm assemblies (blue) transfer the spring energy to the cartridges while being loaded and unloaded. They also serve to maintain the proper orientation of the leading solid spacer rounds.

The upper half of the top spacer round positioned at the open end of the feeBeta Company c-magd clip in an empty C-MAG (Diagram 2) is tapered and linked to the one below (red). The weapon bolt will pass over it and stop in the closed position, after the last round has been fired.

During loading the live cartridges are pressed into the feed clip. The column of spacer rounds and live cartridges are pushed into the drums. The cartridge column splits at the point where the feed clip joins the storage housing; this allows for the concurrent division of the stored ammunition on each side of the magazine. Further into each drum the cartridges are allowed to divide into two concentric rows for storage.

Unloading during firing is the reverse. As cartridges are stripped from the feed clip, the column of cartridges advances to fill the space. The springs in the C-MAG are designed to provide virtually a constant amount of tension, regardless of the number of cartridges remaining in the magazine.

Weapon types

Due to the geometry of its construction, the C-MAG can be used on almost any modern 5.56mm combat rifle or other weapon without any modification to the weapon itself being required. The C-MAG consists of two main components, the centrally located feed clip which is weapon specific and the main storage housing which is a standard for all types of weapons. The feed clip is detachable from the storage housing for maintenance or weapon compatibility purposes.


C-MAG 5.56mm


NATO standard 5.56mm, .223 caliber


Variable, 1 to 100 rounds


Interchangeable feed clips to fit all weapons

Feed Rate

Adjust to rate of fire of weapon; exceeds 1300 rds/min.


9.85 x 4.60 x 3.13 inches (25.0 x 11.7 x 7.95 cm)


Empty: 1kg/2.2 lbs.




Main Components- impact resistant thermoplastic materials / Minor Components- corrosion resistant ferrous and non-ferrous materials

C-MAG 9mm


9mm x 19, Ball, Hollow-point


Variable, 1 to 100 rounds

Feed Rate

Variable up to 1500 rds/minute


265mm x 50mm x 120mm


Empty: 1kg/2.2 lbs.

Shelf Life / Loaded



Main Components- filled termoplastic
Minor Components- non-corrosive steel, alloy materials





Arizona Gun Runners Firearms and Firearm Accessories


Arizona Gun Runners Firearms and Firearm Accessories

Arizona Gun Runners

P.O. Box 350, 4154 N. Hwy 87

Pine AZ 85544

Pine Office: 928 476-3066

Fax: 928 476-3155 (AGR) is a Law Enforcement Wholesale Distributor of Tactical Equipment and Accessories. Arizona Gun Runners ships these products to the Military, Law Enforcement Departments and Individual Military and Law Enforcement Officers throughout the US and the World. Police, Military, Fire Departments and all Public Safety Agencies -- Federal, City, Town, County and State Agencies are also served.








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