Promag Fn 5.7x28mm Ar 55rd Drum
$96.84
$129.99
(You save
$33.15
)
- Capacity-Rounds:
- 5
- Type:
- Magazines
- Caliber-Gauge:
- 5.7x28mm
The ProMag FN 5.7x28mm AR-15 55-round drum magazine delivers high-capacity firepower for shooters running the modern 5.7x28 AR platform. Built with a hybrid construction that pairs mil-spec polymer with heat-treated steel internals, this drum is engineered to feed reliably through extended range sessions, competitions, or training scenarios where magazine capacity matters. At 55 rounds, it's a serious upgrade from standard box magazines—the kind of accessory that keeps you in the action longer and cuts down on reload time.
Construction matters with drum magazines. ProMag combines traditional metalworking with modern polymer injection molding here: the magazine body uses a proprietary DuPont Zytel-based polymer for durability and weight savings, while the upper magazine tower is blue steel and the follower is injection molded to strict tolerances. The magazine spring is formed from heat-treated stainless steel, so it will resist fatigue and corrosion through hundreds of cycles. The result is a domestic-made (USA) drum that balances ruggedness with the kind of reliability you need when you're counting on your magazines to perform.
Worth noting: this drum is built specifically for FN 5.7x28mm AR-pattern rifles and carbines—it does not fit FN 5.7 pistols. ProMag backs every magazine with a lifetime manufacturer's defect warranty, so you're covered if anything fails due to a flaw in materials or workmanship. For AR shooters who want to run the 5.7 platform with serious magazine capacity, this is a no-nonsense option.
Key Features
- 55-round capacity for extended shooting sessions
- Proprietary DuPont Zytel polymer magazine body for durability and reduced weight
- Heat-treated stainless steel spring resists fatigue and corrosion
- Blue steel upper tower and injection-molded follower for reliable feed
- Made in the USA
- Lifetime manufacturer's defect warranty
Specifications
| Caliber | 5.7x28mm |
| Platform | FN 5.7x28mm AR-pattern carbine |
| Capacity | 55 rounds |
| Magazine Type | Drum magazine |
| Magazine Body Material | Proprietary DuPont Zytel-based polymer |
| Upper Tower Material | Blue steel |
| Follower | Injection-molded polymer |
| Spring Material | Heat-treated stainless steel |
| Country of Origin | USA |
| Warranty | Lifetime manufacturer's defect warranty |
Frequently Asked Questions
Will this drum magazine work with my FN 5.7 pistol?
No. This magazine is designed for FN 5.7x28mm AR-pattern rifles and carbines only. It does not fit FN 5.7 pistol models.
What's the magazine capacity?
This is a 55-round drum magazine, providing substantial firepower for extended training, competition, or range sessions before a reload is needed.
What materials are used in the construction?
The magazine body is made from a proprietary DuPont Zytel-based polymer for durability and weight efficiency. The upper tower is blue steel, the follower is injection molded, and the magazine spring is formed from heat-treated stainless steel to resist fatigue and corrosion.
Is this magazine made in the USA?
Yes, the ProMag FN 5.7x28mm drum magazine is manufactured in the USA and is backed by a lifetime warranty against manufacturer's defects.
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