Availability: In Stock
The FN 5.7x28mm 40gr FMJ ammunition is purpose-built for shooters who run 5.7-chambered firearms—whether that's the iconic FN Five-Seven pistol, PS90 bullpup, or other modern sporting rifles in this caliber. Developed by FN Herstal, the originators of 5.7x28mm, these rounds combine the caliber's signature low recoil with genuine ballistic performance, making them equally at home on the range, in competition, or for defensive training. Each box contains 50 rounds of full metal jacket ammunition loaded to deliver consistent velocity and reliable feeding across all 5.7x28mm platforms.
What sets FN's factory ammunition apart is attention to the fundamentals: a 40-grain FMJ projectile seated in a brass case with a boxer primer, assembled to tolerances that cycle reliably without the feeding hiccups that plague lower-grade loads. The result is ammunition you can train hard and long with, shot after shot, without worrying about malfunctions or inconsistency. Felt recoil stays mild—one of the 5.7's defining strengths—so follow-up shots are fast and accurate whether you're working precision at distance or speed on steel at close range.
FN ammunition is the smart choice if you've invested in 5.7x28mm firearms. You're getting rounds engineered by the people who designed the cartridge itself, with the quality control and consistency that factory-fresh ammunition should deliver. Whether you're a competition shooter, a duty-focused trainer, or simply someone who appreciates a low-recoil, high-control shooting platform, these 50 rounds will give you the reliability and performance you expect from the FN name.
| Caliber | 5.7x28mm |
| Bullet Weight | 40 grains |
| Bullet Type | Full Metal Jacket (FMJ) |
| Case Type | Brass |
| Primer | Boxer |
| Rounds Per Box | 50 |
| Muzzle Velocity (Five-Seven Pistol) | 1,700 fps |
| Muzzle Energy (Five-Seven Pistol) | 257 ft-lbs |
| Muzzle Velocity (PS90 Bullpup) | 2,040 fps |
| Muzzle Energy (PS90 Bullpup) | 370 ft-lbs |
FN 5.7x28mm ammunition cycles reliably in all firearms chambered for 5.7x28mm, including the FN Five-Seven pistol, PS90 bullpup, and other modern sporting rifles in this caliber.
Velocity and energy vary by platform. From a Five-Seven pistol, you'll see approximately 1,700 fps and 257 ft-lbs of energy. From a PS90 bullpup, these rounds clock in around 2,040 fps and 370 ft-lbs, thanks to the longer barrel.
Yes. The ammunition uses a brass case with a boxer primer, which allows for reloading if you have the dies and equipment.
These rounds deliver comparable felt recoil, velocity, and accuracy to the SS197SR, so shooters familiar with that load will find them very similar in performance.
SKU: 119717328 • Weight: 0.81oz
Availability: In Stock
The FN 5.7x28mm 40gr FMJ ammunition is purpose-built for shooters who run 5.7-chambered firearms—whether that's the iconic FN Five-Seven pistol, PS90 bullpup, or other modern sporting rifles in this caliber. Developed by FN Herstal, the originators of 5.7x28mm, these rounds combine the caliber's signature low recoil with genuine ballistic performance, making them equally at home on the range, in competition, or for defensive training. Each box contains 50 rounds of full metal jacket ammunition loaded to deliver consistent velocity and reliable feeding across all 5.7x28mm platforms.
What sets FN's factory ammunition apart is attention to the fundamentals: a 40-grain FMJ projectile seated in a brass case with a boxer primer, assembled to tolerances that cycle reliably without the feeding hiccups that plague lower-grade loads. The result is ammunition you can train hard and long with, shot after shot, without worrying about malfunctions or inconsistency. Felt recoil stays mild—one of the 5.7's defining strengths—so follow-up shots are fast and accurate whether you're working precision at distance or speed on steel at close range.
FN ammunition is the smart choice if you've invested in 5.7x28mm firearms. You're getting rounds engineered by the people who designed the cartridge itself, with the quality control and consistency that factory-fresh ammunition should deliver. Whether you're a competition shooter, a duty-focused trainer, or simply someone who appreciates a low-recoil, high-control shooting platform, these 50 rounds will give you the reliability and performance you expect from the FN name.
| Caliber | 5.7x28mm |
| Bullet Weight | 40 grains |
| Bullet Type | Full Metal Jacket (FMJ) |
| Case Type | Brass |
| Primer | Boxer |
| Rounds Per Box | 50 |
| Muzzle Velocity (Five-Seven Pistol) | 1,700 fps |
| Muzzle Energy (Five-Seven Pistol) | 257 ft-lbs |
| Muzzle Velocity (PS90 Bullpup) | 2,040 fps |
| Muzzle Energy (PS90 Bullpup) | 370 ft-lbs |
FN 5.7x28mm ammunition cycles reliably in all firearms chambered for 5.7x28mm, including the FN Five-Seven pistol, PS90 bullpup, and other modern sporting rifles in this caliber.
Velocity and energy vary by platform. From a Five-Seven pistol, you'll see approximately 1,700 fps and 257 ft-lbs of energy. From a PS90 bullpup, these rounds clock in around 2,040 fps and 370 ft-lbs, thanks to the longer barrel.
Yes. The ammunition uses a brass case with a boxer primer, which allows for reloading if you have the dies and equipment.
These rounds deliver comparable felt recoil, velocity, and accuracy to the SS197SR, so shooters familiar with that load will find them very similar in performance.
SKU: 119717328 • Weight: 0.81oz