FN 509C Compact MRD 9mm 509 FDE 12 Round Capacity 66-100574

$729.00 Add to cart for lowest price


FN 509 Compact MRD 9mm FDE 66-100574 comes brand new with - Two interchangeable backstraps - One 12-round and one 15-round magazine - Owner’s manual -= Locking device - FN logo soft pistol case

MDR stands from Mini Red Dot.

509C MRD 9MM FDE 3.7 15+1 FS


509C MRD 9MM FDE 3.7 15+1 FS


With our patented Low-Profile Optics Mounting System and unparalleled modularity of the FN 509 platform the FN 509 Compact MRD joins the ranks packing a full-size punch in a compact optics-ready package. The pistol is 9mm and striker-fired with 3.7-inch barrel standard 12+1 capacity and the capability to accept all higher capacity FN 509 magazines. The patented FN Low-Profile Optics Mounting System accepts nearly all commercially available miniature red dot optics and features blackout iron sights that co-witness. The improved controls aid in manipulation the new improved texturing on the two included backstraps provides better recoil management and a new flatter faced trigger allows for more controllable trigger press and cleaner break. - Caliber: 9mm - Operation: Double-action - Mag Capacity: 12/15 Rd. - Weight: 25.5 oz. - Barrel Length: 3.7 - Overall Length: 6.8 - Twist Rate: 1:10 RH - Height: 5.2 / 4.8 - Width: 1.35 - Trigger Pull: 5.5 - 7.5 lb. - Sight Radius: 5.6 - Primary Features - Full-sized performance in a concealed carry package - Striker-fired autoloader - Double-action operation - Fully ambidextrous controls - FN Low Profile Optics Mounting System with plate adapters for direct mounting of more than 10 optics - All-black co-witness iron sights - SLIDE - Easily racked combat-style sights - External extractor; loaded chamber indicator - Improved front and rear cocking serrations - BARREL - Cold hammer-forged stainless steel - Recessed target crown - Polished chamber and feed ramp - FRAME - Polymer construction with replaceable steel frame rails - Shortened grip for easier concealment - Enhanced grip textures which enables faster follow-up shots in all conditions - Interchangeable backstraps - MIL-STD-1913 accessory mounting rail - Improved flatter face trigger - OPERATING CONTROLS - Fully ambidextrous slide stop lever and magazine release - MAGAZINE - High visibility low-friction follower; polymer base with black finish - Comes with one 12-round and one 15-round magazine - Compatible with FN 509 17-round and 24-round magazines with appropriate magazine sleeves - SHIPS WITH - Two interchangeable backstraps - One 12-round and one 15-round magazine - Owner’s manual -= Locking device - FN logo soft pistol case

Tags: ccw, FN
Condition: New
Manufacturer: FN America
Model: 509 MRD Compact
Caliber: 9mm Luger
SKU: 845737010911
MPN: 66-100574
UPC: 845737010911
Vendor: Gunprime
Reviews (10)
By Kyle J on 03/29/22
(Mostly) perfect carry gun for me

Got a 509 fullsize for my first gun ever. It has been excellent, particularly after replacing the stock trigger after putting many hundreds of rounds downrange, but too big for practical carry for me. Tried other options, but for normal concealed carry duties, this compact version of the 509 is perfect. Good traction (back strap texturing is waaaay better than the full-size 509), grip length and shape make the pistol both comfortable to hold and easy to conceal in an aiwb holster, weight is manageable, capacity is good enough, trigger is still gritty and a bit heavy, but workable for me (even so, after a function check, to be completed soon, I will be replacing the stock trigger which will help with the pull weight, at least). Slap on an optic using the excellent MRD system and it is pretty darned perfect, indeed. Thanks, gunprime, for the good deal and ease of doing business.

By Chris on 02/18/22
First time Gunprime

Excellent experience with Gunprime. Easy order and fast shipment, with notification the whole way. Haven't fired yet, but will definitely use Gunprime again.

By Fly Guy on 03/01/21

When every shop has increased their prices to pandemic status (price gouging), Gunprime’s price remind pretty much the same. I saw a sweet deal and would buy again from them.

By bw2lock on 01/19/21
"Great Compact Firearm"

I am very happy with my purchase of the FN 509C MRD 9mm. This gun feels great, shoots accurate and fast and is optics ready. I previously own an FN FNS 40 Cal and have been very happy with that gun. The 509C is a smaller version and chambered in 9mm which is the most accessible ammunition available. I have an optic ordered and am excited to fit it to the firearm. I also ordered an aftermarket barrel which is threaded to fix a suppressor. Extremely pleased with this purchase. Gunprine delivered my gun to my FFL within 3 days of placing my order. I really appreciate the quick turnaround and will order from Gunprime again.

By Mike on 06/23/20
Great experience

Fn 509 compact is a great pistol.. love it and recommend it!!

By NoVA Shooter on 06/23/20
Good, Almost Great

I've owned this pistol for a couple months now, but due to the pandemic have only had a chance to get it to the range a half-dozen times. Overall, I like the design and feel. Recoil is easily handled and it performs very well. The springs in the mags were extremely stiff to start, but they've softened a bit now, which makes loading easier. The only negative I have on this firearm is the trigger. It's a bit on the heavy side, which works against the short barrel length. It has loosened a little bit after putting a couple hundred rounds through it, but I would have liked to have seen a smoother, easier pull weight overall. I plan to reach out to an FN-authorized gunsmith to see if they can do anything with it. Other than that, it's been very accurate and easy to handle, especially with +P rounds.

By Fde on 06/21/20
Great Buy

Glad I made the purchase. Have not shot it yet but received it from gunprime.com for way below the selling price. This is my every day carry instead of my glock. I also add a red dot to the rail.

By Vince on 06/16/20
Does everything pretty well but budget an extra $50

Gunprime.com's service was excellent! I will be a repeat customer.

Executive summary: I have been looking for a do-everything pistol for quite a while. Although I would prefer a traditional double action, what I am looking for was more easily found with a striker fired pistol. Despite the cons listed below, my experience with this pistol has been very good and I am pleased with the gun's performance and features. I would make the same purchase again.

My individual thoughts on this FN 509 Compact MRD if you are interested:

- Optics ready
- Versatile
- Handles recoil like a larger pistol
- Comes stock with suppressor height / optic co-witness height sights
- Features fully ambidextrous controls*
- Appears to the layman to be well made (no machining marks, tight feel, etc.)
- Price (if you can get the deal I got from Gunprime in January 2020)

- Price (if you pay MSRP)
- No longer FN's latest 509 Compact now that the compact tactical is offered. However, I prefer this model.
- Rumored striker issues with some of the 509 models; unconfirmed by this reviewer
- Only two magazines for the price
- Not as small as some compact pistols
- Spare magazine prices
- *Ambidextrous magazine release protrudes into shooting hand at times
- Finding a holster (at the time of this review)

I was looking for an optics ready compact pistol in late 2019 and narrowed the search down to this model, the CZ P10C OR, and the SIG 365 XL. This gun fit me best and offered the most features from the factory. This is my first FN America product. Installation of a Trijicon RMR I added was straightforward.

As of this review, the pistol has 450 rounds through it. 350 were Blazer Brass 124 grain (my standard target round), 50 were a combination of Federal HST 124 grain and 147 grain, and 50 were Winchester 115 grain. The gun operated flawlessly with the two heavier bullets. There were a few slide lock failures with the 115 grain bullets.

If you spend anytime on FN forums, you will see posts about broken strikers for some users. This possibility of failure is completely unacceptable in what I plan to use as a self-defense tool. It is for that reason that I ordered a heavy duty striker from Apex Tactical at the same time I ordered the gun. This is why I noted to "budget an extra $50" in the headline. Swapping out the factory striker with the Apex striker is a simple process.

Note: It took a lot of research but I found that ANR Design was able to make a holster that accommodates the optic and a Streamlight TLR7a.

By Doug B. on 06/16/20
Awesome Carry Weapon

I have both the mid size and the compact. I really like them both but this one is easier to carry for me. The only thing is I wished it had a threaded barrel.

By DerrickP on 06/15/20
Great gun even better service

I was skeptical about ordering from gun prime because I've never heard of them and the price reduction on this gun was too good to be true. After reading reviews I decided to place and order. I got and email the same day saying my gun was shipped and I actually recieved it 2 days later at my ffl. I must note that this was amid covid 19 price gouge, limited stock and outrageous lead times. GUN PRIME came through for me with a quality product and in a speedy time frame. Will definitely shop again!!!

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