358 Winchester Magazine — CM10 10-Round Magpul PMAG
The 358 Winchester Magazine for Chattahoochee Munitions CM10 rifles is a factory Magpul PMAG 10 LR/SR GEN M3 with a 10-round capacity. This double-feed magazine has been tested and verified by Chattahoochee Munitions for CM10 rifles chambered in 358 Winchester, 338 Federal, and 7mm-08 Remington.
All three cartridges share the 308 Winchester parent case. Although their projectile diameters and cartridge characteristics differ, the specified CM10 configurations use the same factory Magpul magazine without modification.
358 Winchester Magazine Features and Specifications
- Manufacturer: Magpul Industries
- Model: PMAG 10 LR/SR GEN M3
- Manufacturer Part Number: MAG290
- Capacity: 10 rounds
- Magazine Pattern: LR/SR (AR10 / SR25)
- Feed Configuration: Double-feed
- Body Material: Impact-resistant polymer
- Follower: Self-lubricating anti-tilt follower
- Spring: Stainless steel
- Floorplate: Removable for cleaning and maintenance
- Configuration: Factory original, unmodified
- Finish: Black
- Manufacturer-Stated Maximum Cartridge Overall Length: 2.830 inches for specified 308 Winchester ammunition
CM10 Magazine Compatibility — Three Verified Chamberings
Chattahoochee Munitions has tested this 358 Winchester Magazine in its CM10 configurations chambered in 358 Winchester, 338 Federal, and 7mm-08 Remington. The magazine retains its original Magpul follower, spring, body, and internal geometry.
358 Winchester CM10
The 358 Winchester CM10 uses the factory Magpul PMAG 10 LR/SR GEN M3. No changes to the magazine body or internal components are required for this CM-tested configuration.
338 Federal CM10
The 338 Federal CM10 uses the same factory magazine. Chattahoochee Munitions has verified compatibility with this chambering without modifying the magazine’s internal components.
7mm-08 Remington CM10
The 7mm-08 Remington CM10 also uses the factory Magpul 10-round LR/SR magazine. This provides a common magazine configuration across the three specified CM10 chamberings.
358 Winchester Magazine — Factory Configuration
This 358 Winchester Magazine retains its original factory Magpul configuration. Its polymer construction, stainless steel spring, self-lubricating anti-tilt follower, and removable floorplate are standard features of the PMAG 10 LR/SR GEN M3.
The magazine requires no Chattahoochee Munitions modifications for the three verified Variant Valley CM10 chamberings. The manufacturer’s compact 10-round design also provides a lower-profile alternative to larger-capacity LR/SR magazines.
Explore Variant Valley — 308 Based Cartridges
Variant Valley brings together Chattahoochee Munitions CM10 chamberings in 358 Winchester, 338 Federal, and 7mm-08 Remington.
These cartridges share the 308 Winchester parent case while offering different bore diameters and cartridge characteristics. Variant Valley provides a central destination for learning about the cartridge family and exploring its supporting components.
Magpul PMAG 10 LR/SR GEN M3 Manufacturer Information
Magpul manufactures the PMAG 10 LR/SR GEN M3 (MAG290) as a 10-round polymer magazine for compatible LR/SR-pattern rifles. Its factory features include a stainless steel spring, anti-tilt follower, removable floorplate, and textured gripping surfaces.
For original factory specifications and manufacturer compatibility information, visit the Magpul PMAG 10 LR/SR GEN M3 product page.
Compatibility Notice: The additional cartridge compatibility described here has been tested and verified specifically for the Chattahoochee Munitions CM10 configurations listed above. It does not establish universal compatibility with other AR10 or LR/SR-pattern firearms.
Reviews
There are no reviews yet.