Fiocchi 57Comsub Hyperformance 5.7X28Mm Full Metal Jacket 400Rds *Combo Pack

The Fiocchi 57Comsub Hyperformance 5.7x28mm Full Metal Jacket combo pack delivers 400 rounds of versatile 5.7x28mm ammunition built for shooters who want range flexibility without the shopping hassle. This combo pairs two distinct loadings in one purchase: standard-velocity Range Dynamics rounds for high-volume practice and subsonic variants for suppressed shooting or noise-conscious sessions. Whether you're running a suppressed 5.7 pistol, testing different velocities for accuracy work, or simply stocking up for the range, this 400-round bundle gives you the ammunition breadth to handle multiple shooting scenarios without multiple trips to reorder.

Fiocchi's Range Dynamics line focuses on consistent performance at reasonable cost—ideal for the shooter who values reliability over premium pricing. The combo pack format means you get two distinct ammunition profiles: standard FMJ rounds for baseline ballistics and ballistic data, and subsonic loads optimized for sound signature reduction. That versatility matters if you're developing suppressed-load accuracy or comparing velocity signatures for your rifle setup.

This is bulk ammunition for the dedicated 5.7x28mm user—whether you shoot an AR-platform rifle, a bolt gun, or the increasingly popular compact 5.7 pistols entering the market. 400 rounds is a meaningful range session or training block, not a casual box. If you own a 5.7x28mm firearm and you're tired of mail-order shipping delays, the combo pack approach consolidates your order and gives you ammunition variety in a single transaction.

Key Features

• 400 total rounds in one convenient combo pack
• Mixed loading: standard-velocity and subsonic options in a single purchase
• Full Metal Jacket (FMJ) construction for reliable feeding and range performance
• Fiocchi Hyperformance line backed by established ammunition manufacturing standards
• Suited for suppressed and unsuppressed 5.7x28mm rifles and pistols

Specifications

Frequently Asked Questions

What's the breakdown of standard versus subsonic rounds in this combo pack?

The combo includes 300 rounds of standard Range Dynamics 5.7x28mm FMJ (two 150-round boxes) and 100 rounds of subsonic 5.7x28mm FMJ (two 50-round boxes), totaling 400 rounds.

Is this ammunition suitable for suppressed shooting?

Yes. The combo pack includes subsonic-loaded rounds specifically designed for suppressed fire, with a 62-grain FMJ bullet engineered to reduce sound signature. The standard-velocity rounds are also reliable in suppressed rifles, though the subsonic variant is optimized for that application.

What firearms will this 5.7x28mm ammunition work in?

5.7x28mm is chambered in AR-platform rifles, bolt-action rifles, and 5.7 pistols. Verify your specific firearm's compatibility before purchase—this is a specialized cartridge and not all firearms use it.

What's the difference between the standard and subsonic loads in this pack?

The standard Range Dynamics rounds are full-velocity ammunition for general range use and ballistic testing. The subsonic loads feature a heavier 62-grain bullet and reduced powder charge, producing less report and recoil impulse—beneficial for suppressed shooting or low-noise environments.