🎯 Own a futuristic round in your pocket with this FN 5.7×28mm Bullet Keyring, made from a real once-fired casing and 100% inert.

Used in the FN P90 PDW and Five-seveN pistol, this lightweight, high-velocity NATO round stands out for its armor-piercing design and sci-fi style.

✅ Real 5.7×28mm brass or lacquered steel casing
✅ Fully inert – no powder or live primer
✅ Legal to carry and own in the UK
✅ Strong keyring loop with a clean, polished finish
✅ Great gift for FN fans, firearm collectors, and EDC lovers
✅ Ships fast from our UK-based store

Whether you’re an FN fanatic or just love rare calibers, this inert 5.7x28mm keychain is the ultimate blend of form and firepower.

Note: Each keyring is made from once-fired brass and fully deactivated.

📦 Order now with fast, secure UK delivery from Cool Gaming Stuff!

⚡ FN 5.7×28mm: Speed, Science, and the Future of Firepower

In a world dominated by traditional handgun calibers, the FN 5.7×28mm stands out like a Formula 1 car on a dirt track — fast, lightweight, armor-defeating, and built for high performance.

Developed by FN Herstal in the late 1980s as a compact alternative to rifle rounds, the 5.7×28mm has gained a cult following among special forces, law enforcement, and civilian shooters who want rifle-like speed in a pistol-sized package.

Let’s break down why the 5.7mm is often called “the most interesting pistol round in the world.”

🧬 Origins: Born for NATO’s Next War

FN developed the 5.7×28mm cartridge as part of a NATO project to replace 9mm for sidearms and personal defense weapons (PDWs). The goals were ambitious:

• Defeat soft body armor

• Offer higher capacity than 9mm

• Deliver low recoil and high velocity

• Provide a compact cartridge for PDWs

By 1990, FN had created the P90 personal defense weapon and the Five-seveN pistol, both chambered in 5.7×28mm. While NATO never officially replaced 9mm, elite units and specialized roles around the world embraced this round.

⚙️ Ballistics Breakdown: Small Caliber, Serious Speed

Spec – 5.7×28mm
Bullet Diameter: 5.7 mm (.224 inches)
Bullet Weight: 27–40 grains
Muzzle Velocity: 2,000–2,300 fps (from pistol)
Muzzle Energy: ~300–400 ft-lbs
Effective Range: ~150–200 meters
Recoil: Very light

With a muzzle velocity nearly double that of 9mm, the 5.7 delivers flat trajectories, reduced drop, and excellent accuracy — even from a pistol-sized barrel.

Some military/LEO-specific rounds like the SS190 are capable of penetrating soft body armor, though these are typically restricted from civilian sale.

🔫 Guns That Fire 5.7×28mm

• FN Five-seveN – Pistol with 20-round standard mags

• FN P90 / PS90 – Iconic PDW with 50-round mags

• Ruger-57 – Civilian-friendly, affordable 5.7 pistol

• CMMG Banshee 5.7 – AR-pattern PDW/rifle

• Palmetto State Armory Rock 5.7 – New budget contender

• KelTec P50 – Wild design using P90 mags

This expanding ecosystem has turned 5.7 from a niche into a growing modern shooting platform.

🎯 Advantages of 5.7×28mm

✅ Armor-piercing capabilities (in certain loads)
✅ High velocity = flat shooting
✅ Light recoil = fast follow-up shots
✅ High magazine capacity (20+ rounds standard)
✅ Low weight per round = carry more
✅ Cool factor — futuristic design and use in elite units

It’s like carrying a PDW in your waistband.

🧨 Common Ammo Types

Ammo availability has improved dramatically in recent years thanks to Ruger and PSA’s entry into the 5.7 market.

🆚 5.7×28mm vs 9mm Luger

The 5.7 excels in light recoil and penetration, while 9mm remains cheaper and more widely adopted.

🧠 Final Verdict: Is 5.7×28mm Worth It?

If you want a fast, accurate, high-capacity round that bridges the gap between pistol and rifle, the 5.7×28mm is hard to beat. It’s not cheap, but you get a light-shooting, armor-defeating platform that handles like a dream and performs like a science experiment gone right.