ProMag FN Five Seven IOM & USG 5.7x28mm 30-Round Magazine – Black Polymer

ProMag FN Five Seven IOM & USG 5.7x28mm 30-Round Magazine – Black Polymer for Sale

The FN Five Seven is a legendary pistol, but factory magazines limit you to 20 or 30 rounds depending on your model. The ProMag FN Five Seven IOM & USG 5.7x28mm 30-Round Magazine – Black Polymer changes that equation. Whether you own the IOM (Individual Officer Model) or USG (United States Government) variant, this 5.7x28mm magazine delivers reliable, high-capacity firepower. At AmmunitionCart.com, we only stock proven magazine brands. Order today and spend less time reloading and more time on target.

Product Overview

The ProMag 5.7x28mm 30-round magazine is purpose-built for the FN Five Seven pistol platform. Engineered to fit both the IOM and USG generations, this magazine eliminates compatibility confusion. The magazine body is molded from ProMag’s proprietary black polymer formulation – lightweight, impact-resistant, and corrosion-proof.

Inside, you will find a heat-treated stainless steel wire spring and a precision-molded polymer follower designed for the unique bottleneck 5.7x28mm cartridge. Unlike rimmed or tapered pistol rounds, the 5.7x28mm requires exact internal geometry to prevent rim lock and feeding hiccups. ProMag has solved this with a constant-curve internal design that guides each round smoothly into the feed lips.

Key Features

• Compatibility: FN Five Seven IOM and FN Five Seven USG (both models)

• Caliber: 5.7x28mm

• Capacity: 30 Rounds

• Material: Black polymer magazine body

• Spring: Heat-treated stainless steel wire spring

• Follower: Precision-molded polymer

• Weight: Approximately 5.2 ounces (empty)

• Feed Lips: Reinforced polymer for drop protection

• Floor Plate: Removable for cleaning and maintenance

Performance & Reliability

The 5.7x28mm cartridge is unique. Its bottleneck design and light-recoiling nature demand a magazine that feeds flawlessly. The ProMag FN Five Seven 30-round magazine delivers:

• Rim Lock Prevention: The internal geometry prevents the rims of the 5.7x28mm rounds from overlapping – a common failure in poorly designed magazines.

• Consistent Spring Tension: The heat-treated steel spring provides uniform upward pressure from round 1 to round 30.

• Drop Protection: The black polymer body flexes slightly on impact rather than denting like metal magazines.

• Smooth Feeding: The follower glides without tilting, even when the magazine is dirty.

Thousands of Five Seven owners use ProMag as their go-to range and backup magazine. While always test your defensive magazines, ProMag has earned a reputation for reliable performance in high-volume training scenarios.

Why Buy From AmmunitionCart.com

• Authentic ProMag: We are an authorized dealer. No counterfeits or factory seconds.

• Fast Nationwide Shipping: Orders ship within 24 business hours.

• Secure Checkout: Your payment data is fully encrypted.

• Competitive Pricing: MAP-compliant pricing with no hidden fees.

• Reliable Inventory: If listed, it is in our warehouse ready to ship.

• Discreet Packaging: Plain boxes with no firearm-related branding.

• Knowledgeable Support: Our team knows the Five Seven platform.

Best Use Cases

• Range Shooting: Double your time between reloads with 30-round capacity.

• Training Drills: Practice malfunction clearing and reloads with affordable ProMag magazines.

• Backup / Spare Magazines: Keep spare 5.7x28mm mags in your range bag or kit.

• Competition: USPSA or local action pistol matches – fewer reloads mean faster stage times.

• Collectors: Complete your FN Five Seven accessory collection.

• Home Defense Backup: Reliable spare magazine for your primary defense pistol.

Storage Recommendations

To maximize the lifespan of your ProMag 5.7x28mm magazine:

• Store unloaded or loaded – Springs fatigue from cycling, not static compression. Loading to 30 rounds is fine for months or years.

• Keep dry – Store in a cool, dry location. Avoid leaving in hot vehicles (over 150°F can soften polymer).

• Clean occasionally – Disassemble by depressing the floor plate pin. Wipe internal surfaces with a dry cloth.

• No oil inside – The polymer follower is self-lubricating. Oil attracts carbon and dust.

Buying Recommendation

The FN Five Seven has a dedicated following, and ProMag 5.7x28mm 30-round magazines are consistently popular. While we maintain regular stock, production batches sell out quickly – especially after new Five Seven pistol releases.

Do not pay panic prices on auction sites. Get your 30-round ProMag magazines now at AmmunitionCart.com. Buy online securely and upgrade your Five Seven setup today. Order now while supplies last.

Key Features (Bullet Point Summary)

• Brand: ProMag Industries

• Model: FN Five Seven IOM & USG

• Caliber: 5.7x28mm

• Capacity: 30 rounds

• Material: Black polymer

• Spring: Heat-treated stainless steel

• Follower: Precision polymer, anti-tilt

• Compatibility: IOM and USG models only

• Country: Made in USA

FAQs

1. Will this ProMag magazine fit my FN Five Seven MK3?
This magazine is designed specifically for the IOM (Individual Officer Model) and USG (United States Government) generations of the FN Five Seven. For the newer MK3, please check compatibility or contact our support team.

2. Is this 30-round magazine legal in my state?
Magazine capacity laws vary. This is a 30-round magazine. Restrictions apply in California (10 rounds), Colorado (15 rounds), Connecticut (10 rounds), Hawaii, Illinois, Maryland (10 rounds), Massachusetts (10 rounds), New Jersey (10 rounds), New York (10 rounds), Rhode Island, Vermont, Washington DC, and Washington State (10 rounds). Check local laws before ordering.

3. Does ProMag make a 50-round drum for Five Seven?
No. ProMag currently offers 30-round stick magazines for the FN Five Seven. For extended range sessions, we recommend purchasing multiple 30-round magazines.

4. How do I clean my ProMag Five Seven magazine?
Depress the floor plate retaining pin with a punch or small screwdriver. Slide the floor plate off. Remove the spring and follower. Wipe all components with a dry cloth. Reassemble. Do not use solvents or oil inside the magazine body.

5. Is this magazine compatible with the PS90 or FN 5.7x28mm pistols?
No. This magazine is specifically for the FN Five Seven pistol (IOM and USG models). The PS90 uses a completely different 50-round magazine design.