The FN 509 is good from the factory, but these 9 upgrades and accessories make it even better. Light and extended magazine options are here.

I made an effort rank these upgrades and accessories in order of importance.

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Streamlight 69265 TLR-2 and 69245 TLR-4 G

You can hit what you can’t see. These Streamlight light and laser combos are excellent additions to any pistol with a rail. I recommend green lasers over red lasers. According to the NRA, green lasers are more visible in bright sunlight(source). Some folks don’t like running lights because the light is a target. I strongly disagree with this logic. It’s worth giving that slight advantage to an enemy to see clearly who the bullets are going to hit.

These two lights are superb. They each have 3 modes: light only, laser only, and laser and light together. The on/off switch is ambidextrous. Using your shooting finger, the switch on both sides turns these lights on or off.

The TLR-2 throws most of it’s lumens through the center beam for long distance illumination. Around the center beam, a wide disbursed shot of light provides illumination for close distances. This makes the TLR-2 a light for many applications. The TLR-4 provides plenty of light for close distances applications including room clearing and urban self-defense.

These lights have a limited lifetime warranty which excludes batteries, bulbs, abuse and normal wear. Rechargeable batteries, chargers, switch, and electronics are warrantied at for 2 years.

TLR-2

• 800 Lumens
• 4.8 ounces
• $340

TLR-4

• 115 Lumens
• 2.9 ounces
• $240

3M WorkTunes Connect Hearing Protector with Bluetooth

This is my favorite set of hearing protection. I bluetooth it to my phone and listen to music when I am shooting. The headband and ear cups are comfortable. I can wear this all day. The battery lasts several hours. It recharges with USB.

The NRR(Noise Reduction Rating) is 24. That’s a bit low for shooting. It’s best to use ear plugs and these ear muffs together for maximum hearing protection.

Apex Tactical Specialties Threaded Barrel

If you want to put a compensator or suppressor on your 509, then the Apex threaded barrel is for you. It’s a 4 inch barrel. With 1/2×28 threads, it will accept almost all suppressors.

The thread protector comes with an o-ring. This prevents the thread protector from getting free and falling off.

I found nothing saying this barrel is more accurate than a FN threaded barrel.

Apex Action Enhanced Kit

The factory FN 509 trigger is like most factory triggers. It’s reliable and heavy. Apex did us a solid by making a new trigger for the FN 509. It drops the weight to 5.5 pounds. That’s more than a pound lighter than the factory trigger.

The trigger pre-travel, over-travel and reset distance are also reduced.

It fits all FN 509 models including the FN 509 Midsize.

Hyve Technologies +3 Magazine Extension

Hyve Technologies makes a good looking +3 extension for FN 509 magazines. The extension comes in several colors: black, red, grey, od green, tan, blue, violet, and copper.

I was unable to find reviews or official videos.

Hyve does not provide material it’s made of. There is a 30 day money back guarantee.

Trijicon RMR with Adjustable LED

Tired of aligning the front and rear sights? Trijicon’s RMR will solve this problem for you. I am being a bit sarcastic, but getting on target is faster with a RMR.

The RMR comes with legendary Trijicon reliability. RMRs are trusted by police and militaries the world over.

The battery requires removing the sight and re-zeroing. Trij says RMRs batteries last for more than 4 years of continuous use. You might want to replace the battery every year to be on the safe side.

I recommend the adjustable LED RMR. This version gives shooters full control over dot brightness. The dot is only available in red. There are 3 dot sizes available. In theory the larger the dot size the faster the eye alignment. I disagree with this logic. The RMR requires training regardless of the dot size and the small the dots size the more precise the shots.

Using the RMR does not turn a P10C into a video game gun. You will still need to practice drawing the gun. It takes muscle memory to bring the dot to the eye every time.

Parker Mountain Machine FNH 509 Compensator

This is an effective and reliable compensator for the FN 509. It designed around the factory 509 threaded barrel. A single port pointing up ejects the gas.

It will work with most factory loaded ammunition, but works best with +P and NATO Ammunition.

The colors available are black and flat dark earth.

Osprey 45 Suppressor

The 509 is great and it’s even greater when shooting without ear protection.

Why did I choose the Osprey 45? It’s one of the quietest, I have one, and it has some great features.

The threads are on a removable piston. The allows the suppressor to fit on all common male thread sizes with a piston change.

The unique tombstone shape makes the osprey sit lower than round suppressor when attached. This reduces the height a pistol’s sights need to rise above.

The Osprey 45 works with several common calibers including 45, 40, 10mm, 9mm, and subsonic 300 BLK.

Of course a suppressor does not increase the stopping power of a pistol. Concealed carrying a pistol is large, uncomfortable combo. If you do carry a suppressed pistol, then you are straight savage.

Check out my Osprey 45 suppressor with subsonic and supersonic ammo.

Talon Tactical Grips

Talon grips provide a large increase in traction over the factory grip texture. Granulated and rubber are the texture types. The granulated textures feels like sandpaper or skateboard tape. This texture is best with holster carry and competition shooting. The rubber texture is best for concealed carry because it will not irritate skin. Also shooters with soft skin should use the less abrasive rubber texture.

They are made in America with a 90 day warranty.