Sierra Defence 12 Gauge 20-Round Drum Magazine
For those running magazine-fed shotguns, this is about as far as you can push capacity without constantly reloading.
The Sierra Defence 20-round drum magazine is designed for AR-style and MKA1919-pattern 12-gauge shotguns, giving you significantly extended shooting time in a compact, well-balanced format. Built from durable polymer with a reinforced feed system, it’s engineered to handle regular use without adding unnecessary weight or complexity.
Unlike some older drum designs, this uses a simplified internal mechanism with fewer moving parts, helping improve reliability and making maintenance straightforward. The loading system is intuitive, and once set up correctly, it feeds consistently across a wide range of compatible platforms.
Whether you’re on the range, running practical stages, or just want to maximise time shooting between reloads, this drum delivers a noticeable step up from standard box magazines.
Key Features
- 20-round capacity – extended shooting without frequent reloads
- Durable polymer construction – strong but keeps overall weight manageable
- Simplified internal design – fewer moving parts for improved reliability
- Reinforced feed tower – designed for consistent feeding under use
- User-friendly loading system – quick to set up and reload
Compatibility
Designed for most AR-style / MKA1919-pattern 12-gauge shotguns, including popular platforms such as:
- Typhoon F12
- Derya MK12 series
- And similar magazine-fed shotgun platforms
(Not compatible with Saiga-pattern shotguns)
Ideal For
- Practical / PSG shooting
- Range sessions where reload time matters
- Shooters already familiar with mag-fed platforms looking for something a bit more interesting
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