semi-auto | United States
| Caliber | 5.7×28mm |
|---|---|
| Barrel | 127 mm (5.0 in) |
| Weight | 750 g (26.5 oz, manufacturer figure) |
| Capacity | 20 rounds |
| Action | semi-auto |
| Manufacturer | Kel-Tec |
| Country | United States |
The PR57 is a semi-auto firearm chambered in 5.7×28mm, built by Kel-Tec in United States. From its 127 mm (5.0 in) barrel, Federal American Eagle Handgun, 5.7x28mm, Full Metal Jacket (40 gr FMJ) leaves the muzzle at about 1655 fps (504 m/s). Zeroed at 50 m, the bullet drops 94 mm by 100 m with 176 J (130 ft-lb) left. At the muzzle that is enough to defeat Drywall, Plate Glass and Pine Wood, and not enough for Brick, AR500 Steel and Kevlar NIJ IIIA. It feeds from a 20-round magazine.
Computed by the BallisticEngine engine for this barrel length, zeroed at 50 m, 15 °C, sea level, no wind.
| Distance | Drop | Velocity | Energy | Time |
|---|---|---|---|---|
| 50 m | 0 mm | 429 m/s | 238 J | 0.11 s |
| 100 m | -94 mm | 369 m/s | 176 J | 0.23 s |
| 200 m | -875 mm | 299 m/s | 115 J | 0.54 s |
| 300 m | -2752 mm | 262 m/s | 89 J | 0.90 s |
Against a semi-infinite block of each material, with Federal American Eagle Handgun, 5.7x28mm, Full Metal Jacket at the muzzle. The verdict compares the depth reached against a realistic barrier thickness.
| Material | Verdict | Depth |
|---|---|---|
| Drywall (½") | ✓ Full penetration | 289 mm |
| Plate Glass (¼") | ✓ Full penetration | 16 mm |
| Pine Wood (1") | ✓ Full penetration | 184 mm |
| Brick (4") | ✗ Stopped | 89 mm |
| AR500 Steel (⅜") | ✗ Stopped | 1 mm |
| Kevlar NIJ IIIA | ✗ Stopped | 3 mm |
| Load | Mass | Velocity | Type | BC (G1) |
|---|---|---|---|---|
| Federal Federal American Eagle Handgun, 5.7x28mm, 40 Grain, Full Metal Jacket, 1655 fps | 40 gr | 1655 fps (504 m/s) | FMJ | 0.140 |
| Fiocchi Fiocchi 5.7x28mm 35gr FMJ | 35 gr | 1700 fps (518 m/s) | FMJ | 0.150 |
| Fiocchi Fiocchi 5.7x28mm 40gr Full Metal Jacket | 40 gr | 1700 fps (518 m/s) | FMJ | 0.150 |
| Fiocchi Fiocchi 5.7x28mm 40gr Polymer Tip | 40 gr | 1755 fps (535 m/s) | SP | 0.210 |
| Fiocchi Fiocchi 5.7x28mm 62gr Full Metal Jacket | 62 gr | 1025 fps (312 m/s) | FMJ | 0.274 |
| Hornady Hornady 5.7X28mm 40 gr FTX® Critical Defense® | 40 gr | 1810 fps (552 m/s) | HP | 0.150 |
| Hornady Hornady 5.7X28mm 40 gr V-MAX® Black™ | 40 gr | 1810 fps (552 m/s) | HP | 0.150 |
7 loads available in 5.7×28mm.