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M4 AEG High-Cap Polymer Magazine (300 Rounds) – Maximum Ammunition Capacity
Want to stop worrying about frequent magazine changes and empty pockets in the middle of intense airsoft matches? This 300-round High-Cap polymer magazine for M4/AR15-based electric airsoft rifles (AEG) gives you the firepower you need to keep your opponents pinned down, in a lightweight and durable package.
Tip from the technical workshop: High-Cap magazines are the perfect choice for beginners or players who shoot a lot in full-auto. Since it holds so many BBs, you won’t need to carry a whole bunch of extra gear in your vest. Just remember to wind the wheel at the bottom of the magazine until you hear a deeper “click” – then you know the spring is fully wound and ready to feed the BBs smoothly into the rifle!
Easy Filling and Durable Polymer Shell
The magazine is made with a high-quality polymer outer shell.This material ensures that the magazine can withstand rough handling, scratches, and drops on the playing field, while keeping its weight to a minimum. The surface has a classic, functional design that provides a secure, comfortable grip when inserting or removing it during hectic gameplay.
Filling the magazine couldn’t be easier: Simply open the spacious hatch on top of the magazine and pour the BBs straight in from the BB bag or bottle. In other words, you don’t need a separate speedloader to fill this magazine, making it incredibly quick to prepare in the staging area between rounds.
Universal Compatibility and Reliable Operation
Inside, the magazine is powered by a sturdy internal spring mechanism connected to the gear (winding wheel) at the bottom. Turning the wheel efficiently feeds the BBs up into the feed nozzle.The magazine has a standardized M4/AR15 design, which means it has a universal fit and is compatible with most electric airsoft models (AEGs) on the market—including popular platforms such as M4, AR15, M15, HK416, and similar models.
Useful info about using High-Cap magazines:
- No speedloader required: This magazine is filled by pouring BBs directly into the large opening on top.
- Feeding during gameplay: To keep the magazine feeding BBs throughout the game, you need to occasionally wind the wheel at the bottom during the round.
- Ammo tip: Always use 6mm quality BBs (f.eks. 0.20g or 0.25g) to ensure smooth feeding and prevent the mechanism from jamming.
Technical specifications
| Magazine type | High-Cap (High Capacity) |
| Compatibility | M4 / AR15 / M15 / HK416 AEG (Electric rifles) |
| Capacity | 300 rounds |
| Loading mechanism | Manual winding wheel at the bottom (Knob operation) |
| Material | Durable polymer (plastic) |
| Caliber | 6 mm airsoft BBs |
The customer purchases the goods at their own risk and is responsible for complying with all local legal requirements regarding the purchase, possession, use, or transport of the goods available in the online store.
This includes, but is not limited to, ASG (softguns), air rifles, and paintball replicas, which may be subject to specific regulations concerning weapons and ammunition.
Restrictions on the purchase, possession, use, or transport of these goods may apply in the destination country, and the seller assumes no responsibility for this. Any fees or costs (including administrative fees, validation, taxes, and customs duties) are the customer's responsibility.
The use of ASG (softguns), air rifles, and paintball replicas requires appropriate safety measures and caution. These products are not intended for persons under 18 years of age.
