Promag Walther P99 9mm Drum 50rd Blk

The Promag 50-round drum magazine for Walther P99 9mm delivers serious capacity for shooters who want more rounds between reloads. Whether you're running high-volume range sessions, competition shooting, or just maximizing trigger time, a 50-round drum changes the math on magazine changes. This is the black polymer version, built tough enough for serious use.

Construction matters with drum magazines, and Promag backs that up here. The magazine body uses a proprietary DuPont Zytel based polymer — the same material you'll find in serious tactical and duty gear — paired with a blue steel upper tower for durability where it counts. The injection-molded follower and heat-treated stainless steel spring are engineered to handle the demands of a high-capacity drum without the reliability issues that plague cheaper designs. Made in the USA, this isn't a throwaway mag.

Compatible with Walther P99 and SW99 series 9mm pistols, the Promag 50-round drum fits shooters who run these platforms and want the advantage of extended capacity. Drums require a bit more attention to maintenance and careful storage than single-stack mags — keep it clean and don't leave it loaded indefinitely — but when you need the ammo, there's no substitute.

Key Features

• 50-round capacity for extended shooting without magazine changes
• Proprietary DuPont Zytel polymer body for reliability and durability
• Blue steel upper tower for added strength at the critical connection point
• Heat-treated stainless steel spring resists fatigue and corrosion
• Injection-molded follower ensures consistent round feeding
• Made in USA
• Black finish

Specifications

Capacity	50 rounds
Caliber	9mm
Fits	Walther P99 and SW99 series
Material (Body)	DuPont Zytel based polymer
Material (Upper Tower)	Blue steel
Material (Spring)	Heat-treated stainless steel
Follower	Injection molded
Color	Black
Manufacture	USA

Frequently Asked Questions

Will this 50-round magazine work in my Walther P99 or SW99?

Yes. The Promag 50-round drum is designed to fit Walther P99 and SW99 series 9mm pistols.

What's the advantage of a drum magazine over standard mags?

A 50-round drum lets you shoot much longer without changing magazines — ideal for high-volume range sessions, training courses, or competition where you want to focus on shooting rather than constantly reloading. The tradeoff is that drums are bulkier, require more maintenance, and shouldn't be stored loaded for extended periods.

What materials is this magazine made from?

The magazine body is constructed from proprietary DuPont Zytel based polymer. The upper tower is blue steel, the spring is heat-treated stainless steel, and the follower is injection molded.

Is this magazine made in the United States?

Yes, the Promag 50-round drum is made in the USA.