FN 509 MRD for sale
Updated · 31 products · 21 in stock · prices refreshed daily
(6)
FN 509M MRD Midsize 9mm Pistol, Black - 66-100587
Brand:
FNH
Action:
Semi-Auto
Barrel Length:
4"
Caliber:
9×19mm Parabellum
Capacity:
15
Finish Per Color:
Black
(14)
FN 509 MRD 9mm Pistol, FDE - 66-100741
Brand:
FNH
Action:
Semi-Auto
Barrel Length:
4"
Caliber:
9×19mm Parabellum
Capacity:
15
Finish Per Color:
Flat Dark Earth
(0)
FN 509 Midsize Tactical 9mm 4.5" Barrel 24-Rounds MRD Ready
Action:
Semi-Auto
Barrel Length:
4.5"
Caliber:
9×19mm Parabellum
Capacity:
15
Finish Per Color:
Black
(0)
FN 509M MRD Flat Dark Earth 9mm 4" Barrel 10-Rounds Co-Witness Iron Sights
Brand:
FN America
Action:
Semi-Auto
Barrel Length:
4"
Caliber:
9×19mm Parabellum
Capacity:
10
Finish Per Color:
Flat Dark Earth
(1)
FN America 509 Midsize MRD 9mm Pistol, Blk - 66-100588
Brand:
FNH
Action:
Semi-Auto
Barrel Length:
4"
Caliber:
9×19mm Parabellum
Capacity:
10
Finish Per Color:
Black
(0)
FN 509 Midsize Tactical 9mm 4.5" Barrel 10-Rounds MRD Ready
Brand:
FN America
Action:
Semi-Auto
Barrel Length:
4.5"
Caliber:
9×19mm Parabellum
Capacity:
10
Finish Per Color:
Black
(2)
FN 509 Compact MRD 9mm 12rd & 15rd NMS Black Pistol 66-100571
Brand:
FN America
Action:
Semi-Auto
Barrel Length:
3.7"
Caliber:
9×19mm Parabellum
Capacity:
15
Finish Per Color:
Black
(0)
FNH FN 509 Compact MRD 9mm Pistol, Blk - 66100572
Brand:
FNH
Action:
Semi-Auto
Barrel Length:
3.7"
Caliber:
9×19mm Parabellum
Capacity:
10
Finish Per Color:
Black
(0)
FN 509 Full Size MRD 9mm, 4.5" Barrel, Black, Interchangeable Backstraps, 17rd
Brand:
FN America
Action:
Semi-Auto
Barrel Length:
4.5"
Caliber:
9×19mm Parabellum
Capacity:
17
Finish Per Color:
Black
(0)
FN 509 Midsize Tactical Flat Dark Earth 9mm 4.5" Barrel 10-Rounds MRD Ready
Brand:
FN America
Action:
Semi-Auto
Barrel Length:
4.5"
Caliber:
9×19mm Parabellum
Capacity:
10
Finish Per Color:
Flat Dark Earth
(9)
FN 509 Compact MRD 9mm 15rd 3.7" Pistol, FDE - 66-100574
Brand:
FNH
Action:
Semi-Auto
Barrel Length:
3.7"
Caliber:
9×19mm Parabellum
Capacity:
15
Finish Per Color:
Flat Dark Earth
(0)
FN 509 MRD 9mm, 4.5" Barrel, Black, Optic Ready, 10rd
Brand:
FN America
Action:
Semi-Auto
Barrel Length:
4.5"
Caliber:
9×19mm Parabellum
Capacity:
10
Finish Per Color:
Black
(1)
FNH FN 509 Compact MRD 9mm Pistol, FDE - 66100575
Brand:
FNH
Action:
Semi-Auto
Barrel Length:
3.7"
Caliber:
9×19mm Parabellum
Capacity:
10
Finish Per Color:
Flat Dark Earth
(0)
Fn 509 Full Size Mrd 9mm No - Safety 2-10rd Fde
Brand:
FN America
Action:
Semi-Auto
Barrel Length:
4.5"
Caliber:
9×19mm Parabellum
Capacity:
10
Finish Per Color:
Flat Dark Earth
(0)
FN 509M MRD 9mm, 4" Barrel, Black, Holosun 407C Red Dot, 24rd
Brand:
FN America
Action:
Semi-Auto
Barrel Length:
4"
Caliber:
9×19mm Parabellum
Capacity:
17
Finish Per Color:
Black
(0)
FN 509 MRD FOS Bundle 9mm 4" Barrel 10-Rounds 5 Mags
Brand:
FNH
Action:
Semi-Auto
Barrel Length:
4"
Caliber:
9×19mm Parabellum
Capacity:
10
Finish Per Color:
Black
(0)
FN 509 Midsize Tactical Flat Dark Earth 9mm 4.5" Barrel 24-Rounds MRD Ready
Brand:
FN America
Action:
Semi-Auto
Barrel Length:
4.5"
Caliber:
9×19mm Parabellum
Capacity:
15
Finish Per Color:
Flat Dark Earth
(0)
FN FN 509 Midsize MRD Flat Dark Earth 9mm 4" Barrel 24-Rounds
Brand:
FN America
Action:
Semi-Auto
Barrel Length:
4"
Caliber:
9×19mm Parabellum
Capacity:
24
Finish Per Color:
Flat Dark Earth
(0)
FN America FN 509F Mrd Nms Blk/Blk NS 3X17 Le1 66-101345
Brand:
RED ARMY STANDARD
Action:
Semi-Auto
Barrel Length:
4"
Caliber:
9×19mm Parabellum
Capacity:
17
Finish Per Color:
Black
(0)
Fn 509 Full Size Mrd 9mm Nms - W/ Holosun 407c 2-17rd Fde
Brand:
FN America
Action:
Semi-Auto
Barrel Length:
4"
Caliber:
9×19mm Parabellum
Capacity:
17
Finish Per Color:
Flat Dark Earth
(0)
FN 509 Compact MRD 9mm Pistol, Black - 66-100573
Brand:
FNH
Action:
Semi-Auto
Barrel Length:
3.7"
Caliber:
9×19mm Parabellum
Capacity:
12
Finish Per Color:
Black
(0)
FN 509M MRD 4" 10RD NS HSN 407C FDE UPC: 845737018399
Brand:
FN America
Action:
Semi-Auto
Barrel Length:
4"
Caliber:
9×19mm Parabellum
Capacity:
10
Finish Per Color:
Flat Dark Earth
(0)
FN 509M MRD 4" 10RD NS HSN 407C BLK
Brand:
FN America
Action:
Semi-Auto
Barrel Length:
4"
Caliber:
9×19mm Parabellum
Capacity:
10
Finish Per Color:
Black
(0)
FN 509 MRD-LE Full Size Optic Ready 9mm Pistol - Night Sights - 17 Round - LAPD Model - QUALIFIED INDIVIDUALS ONLY
Brand:
FN America
Action:
Semi-Auto
Barrel Length:
4"
Caliber:
9×19mm Parabellum
Capacity:
17
Marketplace Insights
★ 4.6/5
based on 35 customer reviews across 31 products from 24 retailers
Highly rated FN 509 offers excellent reliability, accuracy, and ergonomics at a competitive price, though some users note the stock trigger requires improvement or replacement.
What customers like
Reliability & Performance43%
hasn't jammed once with over 300rds of varying grain ammunition
Ergonomics & Grip37%
Feels great in the hand
Accuracy & Shooting31%
I am more accurate with it
Design & Aesthetics26%
Pistol is aesthetically pleasing
Value for Price17%
great value for a MHS pistol
Common concerns
Trigger Quality Issues31%
trigger is gritty
Sights & Optics Design14%
You can't lock the optic down after zero without removing the optic
Magazine & Grip Concerns9%
mags feel cheap
Product Condition Issues6%
nice sized scratch in the top of the slide
Frequently Asked Questions
FN 509 MRD for sale
What does mrd mean on FN 509?
MRD stands for Mini Red Dot. FN 509 models with this designation feature the FN Low Profile Optics Mounting System, allowing direct mounting of miniature red dot sights without aftermarket adapters.
How much is the FN 509 MRD?
FN 509 MRD models on our marketplace range from $618–$929. Three variants exist: Midsize MRD, Compact MRD, and MRD-LE. MSRPs run $749–$839 depending on variant, though street prices can be significantly lower. All feature the FN Low Profile Optics Mounting System for direct red dot attachment.
How much is the FN 509 Compact MRD?
The FN 509 Compact MRD typically costs around $756 on our marketplace, with most listings between $618–$929. MSRP is $834. This 9mm striker-fired compact features a 12-round capacity, 3.7-inch barrel, and a low-profile optics mounting system for direct red dot mounting. Twenty-two of twenty-three variants are in stock across thirty-three retailers.
What are common FN 509 problems?
Reported issues include trigger stiffness, slide stop malfunctions, failure to feed, stovepipes, and erratic ejections. Some users experienced firing pin breakage and accuracy inconsistencies. Many problems resolved after a break-in period. Ammunition quality and proper lubrication before first use matter significantly. FN's warranty covers manufacturing defects.
Is the FN 509 compact a good gun?
Whether it's "good" depends on your needs. The FN 509 Compact is reliable, accurate, and well-suited for concealed carry with its 15+1 capacity and striker-fired action. User feedback is generally positive. Handle and shoot one before buying to confirm it fits your hand and style.
What holster will fit a FN 509?
FN 509 holsters are molded for specific variants: standard, compact, tactical, and LS Edge. Options include IWB, OWB, chest, paddle, and hook-and-loop configurations. FNX or FNS holsters won't fit due to different frame and slide dimensions. Dedicated 509 holsters are available from multiple retailers starting around $40.
