
FN 66100797 509 Compact Tactical 9mm Luger 4.32″ Threaded Barrel, 12+1/24+1, FDE Polymer Frame w/Mounting Rail, Optic Cut FDE Stainless Steel Slide, Includes Viper Red Dot
March 27, 2026
GFORCE ARMS GF5 410/28 O/U BLK/WD
March 27, 2026FN 66101928 509 MRD w/Optic 9mm Luger 10+1 Holosun 407C Red Dot
$849.00
FN 66101928 509 MRD w/Optic 9mm Luger 10+1 Holosun 407C Red Dot
12 in stock
The FN 509 MRD full size pistol equipped with the patented Low Profile Optics Mounting System for users who want a full-sized duty-style pistol for personal or home defense. The pistol is chambered in 9mm and features a 4.50″ cold hammer-forged barrel featuring the FN 509 signature recessed target crown to protect rifling, maintain accuracy and performance throughout the lifespan of the pistol. The slide and frame offer a secure grip and reduced recoil. Includes Holosun 407C Red Dot, FN logo soft case, two 17rd magazines, three interchangeable backstraps, four MRD mounting plates, owners manual and gun lock.
| UPC | 845737018351 |
|---|---|
| Manufacturer | FN America / FN Herstal |
| Manufacturer Part Number | 66101928 |
| Action | Double Action Only |
| Barrel Length | 4.50" |
| Caliber/Gauge | 9mm |
| Capacity | 10 + 1 |
| Safety | No Manual |
| Slide Description | Optic Cut/Serrated |





