CM15 300 Blackout Magazine – ETS 30-Round
This CM-vetted 300 Blackout magazine is a 30-round Elite Tactical Systems Group magazine offered for CM15 firearms chambered in 300 BLK. Its translucent carbon-smoke polymer body lets the shooter visually check ammunition type and approximate round count without unloading the magazine.
The magazine fits standard AR-15-pattern magazine wells and combines improved feed-lip geometry, a no-tilt follower and an enlarged over-insertion stop. Exterior grip ribs and an ergonomically shaped floorplate provide positive control when loading, removing or retrieving the magazine from a pouch.
Use it as a supporting magazine for the complete selection of CM15 300 Blackout firearms, or explore rifles, pistols, SBRs, upper receivers and other caliber-specific products in Sector 300.
A CM-Vetted Magazine for the CM15 Platform
Chattahoochee Munitions vets the magazines offered for our firearms and their stated caliber applications. This 300 Blackout magazine has been evaluated for use with the CM15 rather than added to the catalog solely because it fits an AR-15 magazine well.
The underlying ETS magazine is manufactured for .223 Remington and 5.56 NATO AR-platform firearms. That magazine pattern is also commonly used with 300 Blackout because the cartridges share compatible AR-15 bolt and magazine-well geometry. CM nevertheless treats magazine selection as part of the complete firearm system and verifies suitability for the stated CM15 application.
Individual projectile profiles, cartridge overall lengths and load characteristics can still vary. This is particularly relevant when moving between lightweight supersonic ammunition and heavy subsonic loads. Shooters should function-test their chosen ammunition before depending on any firearm, magazine and ammunition combination for hunting, defense or another critical application.
Carbon-Smoke Polymer Construction
Elite Tactical Systems manufactures the magazine with a translucent carbon-smoke polymer body. The material provides a balance of visibility, durability and low weight while giving the magazine a distinctive appearance.
The translucent body allows the shooter to see the ammunition inside the magazine. That visibility can help distinguish 300 BLK cartridges from 5.56 NATO ammunition and makes it easier to estimate the remaining supply. This feature is especially useful for shooters who maintain firearms chambered in both calibers.
Visibility does not replace deliberate caliber labeling or proper ammunition organization. Loaded magazines should still be clearly identified and stored with the correct firearm.
300 Blackout Magazine Features
- Capacity: Standard 30-round capacity
- Platform: Standard AR-15-pattern magazine wells
- CM application: Vetted for CM15 firearms chambered in 300 BLK
- Body: Translucent carbon-smoke polymer
- Follower: No-tilt follower with reliable last-round bolt hold-open operation
- Feed lips: Improved geometry for compatibility with a wider range of receivers
- Over-insertion stop: Enlarged to improve magazine retention and help prevent excessive insertion
- Dust cover: Clip-on cover helps keep dirt and debris out during storage
- Maintenance: Tool-free disassembly through the specially designed floorplate
- Handling: Exterior grip ribs provide added control during loading and magazine changes
- Floorplate: Ergonomic shape supports positive removal from magazine pouches
- Warranty: Backed by the ETS lifetime warranty
Designed for Convenient Inspection and Maintenance
The removable floorplate allows the 300 Blackout magazine to be disassembled without specialized tools. This simplifies routine inspection and cleaning after range use or exposure to dust, moisture and debris.
The included clip-on dust cover protects the top of the magazine during storage. It helps keep contaminants away from the feed lips and follower while the magazine is not in use. Before loading a firearm, remove the cover and inspect the magazine, ammunition and feed area for obstructions or visible damage.
Avoid permanently altering the feed lips, follower or internal geometry. If a magazine becomes damaged or begins producing repeatable feeding problems, remove it from service until it can be inspected or replaced.
Supersonic and Subsonic Ammunition
One of the defining capabilities of 300 Blackout is its use of both lightweight supersonic ammunition and heavy subsonic ammunition. Those loads can differ considerably in projectile length, shape and overall cartridge configuration.
This CM-vetted magazine provides a practical option for feeding the CM15, but no magazine can correct ammunition that falls outside proper dimensional specifications. Confirm reliable feeding, bolt hold-open operation and normal firearm function with each load you plan to use.
When testing a new load, begin with a clean firearm and magazine. Load a limited number of cartridges, confirm proper presentation from the feed lips and observe feeding and last-round bolt hold-open operation before progressing to a fully loaded magazine.
Caliber Identification and Safety
Keep 300 Blackout ammunition and loaded magazines clearly separated from 5.56 NATO firearms. A 300 BLK cartridge can potentially enter a 5.56 chamber far enough to create a bore obstruction and catastrophic firearm failure if fired.
The carbon-smoke body helps the shooter visually identify the ammunition, but visual access alone is not a complete safety system. Use clear caliber markings, organized ammunition storage and dedicated magazines when practical. Always confirm the firearm’s chambering and the ammunition headstamp before loading.
Complete Your CM15 300 Blackout System
This 300 Blackout magazine supports the CM15 family of rifles, pistols and SBRs. Sector 300 brings those complete firearms together with CM15 upper receivers, ammunition and caliber-specific resources so customers can evaluate each configuration as part of an interconnected 300 BLK system.
For additional information about the carbon-smoke material, manufacturer warranty and magazine construction, visit Elite Tactical Systems Group.
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