Another slim, ultra-compact carry pistol hits the market. FN introduces its smallest model, the FN 503, a 9mm polimer-framed, striker-fired autoloader purpose-built for concealed carry. Among its features a 3.1”/79 mm barrel with recessed target crown, enlarged controls and FN 509-style low-profile iron sight.
FN 503, a small sized gun
The FN 503 also sports a “skateboard tape-style” grip texture that provides all-day carry comfort. The all-metal trigger has a 5 to 7 lbs. trigger pull. A polished chamber and feed ramp ensure reliable feeding. The magazine with pinky extension holds 6 cartridges – actually, not a so impressive firepower, but an extended magazine with grip sleeve can add two rounds, for a total of eight cartridges. This is the price you have to pay for a gun whose width is just a smidge more than an inch (1.1”/28 mm, the slide itself is just 0.9”/23 mm wide), for a length of 5.9”/147 mm and a height of 4.6”/116 mm.
The FN 503 utilizes same dovetail as FN 509 series of pistols and is equipped with a loaded chamber indicator. For a price of 549 USD (MSRP), the FN 503 comes with two magazines (6-round and 8-round extended magazine).
The FN 503 in video
FN 503 specs and price
| Caliber: | 9mm |
| Operation: | Striker fired |
| Magazine capacity: | (1) 6-round with pinky extension; (1) 8-round with grip sleeve |
| Length: | 5.9”/147 mm |
| Height: | 4.6”/116 mm |
| Weight: | 21 oz/595 g |
| Width: | 1.1”/28 mm |
| Barrel Length: | 3.1”/79 mm (twist rate: 1:10 RH) |
| Sights: | Low-profile, snag-free, three-dot iron sights with FN 509 doveta |
| Trigger pull weight: | 5-7 lb (2268-3175 g |
| MSRP: | 549 USD |












