Skip to content

FN 5.7 x 28

The 5.7 x 28 round was developed in the 1980’s by Fabrique Nationale Herstal (FN) of Belgium.

FN 5.7 x 28 is a rifle caliber round, but shortened to be small enough to be used in pistols. This gives weapons in thr 5.7 x 28 caliber enormous magazine capacities. The FN P90 rifle has a standard magazine capacity of 50 rounds, while the FN Five-seveN pistol features a magazine capacity of 20 rounds.

The short barrel of the Five-seveN pistol pushes the 5.7 x 28 SS190 round to 2,133fps. The same round reaches 2,346fps when fired from the FN P90.

In an attempt to be environmentally friendly, most 5.7 x 28 ammunition is lead-free.

Weapons Chambered for 5.7 x 28 Ammunition

Fabrique Nationale Herstal (FN) is the only current manufacturer of weapons using the 5.7 x 28 cartridge.

FN Herstal manufactures the P90 rifle and the Five-seveN pistol.

FN P90

The FN P90 is an extremely compact design which is fully ambidextrous.

The FN P90 features a unique design where the magazine is placed along the length of the top of the barrel. This gives the rifle all of the advantages of a bull-pup design. In addition, the P90 ejects spent cases downwards, which will please most shooters.

FN Five-seveN

The FN Five-Seven has been produced in several variant models:

  • The Five-seveN Tactical – Single Action
  • The Five-seveN Double Action Only (DAO), no manual safety
  • The Five-seveN IOM (Individual Officers Model) – Single Action with adjustable rear sights, cross-slots added to the tactical rail, and a magazine disconnect safety.
  • The Five-seveN USG (United States Government) – Single Action with checkering on the foregrip and backstrap, a squared trigger-guard, and an ambidextrous magazine release.

FN 5.7 x 28 Ammunition Types

Name Purpose Bullet Weight Identification
SS190 Armor Piercing 31gr Unpainted tip
SS191 Armor Piercing Tracer    
SS192 Hollow Point 28gr Green tip
Sb193 Subsonic 55gr White tip
SS195 Lead-free Hollow Point with copper jacket    
SS196 Hollow Point Lead 40gr  
L191 Tracer 31gr Red tip
T194 Training 31gr Brown tip

FN 5.7 x 28 Ammunition Performance

Weapon SS190/L191 Sb193 SS192
P90 2,346fps / 715m/s 320m/s 705m/s
Five-seveN 2,133fps / 650m/s 305m/s 640m/s