3 Best Red Dots for FN 509 Tactical, LS Edge, Compact [Updated 2021]

In this guide, let's check out some of the best red dots for FN 509 Tactical, LS EDGE & Compact CCW models on the market.

Some are great for range use and some are great for a carry optic.

Don't waste money on a poor optic that will lose zero, get the ones that are already proven to work!

Let's check it out...

2 Best Red Dot Sights for FN 509 Series Pistols

Trijicon SRO - Largest FOV

Why we picked this one - The SRO is by far the best large window optic for the FN 509, FN 509 LS Edge, and other handguns for fast target acquisition. The design, looks and color matching are just pure sex on the FN 509.

Bigger Window  - Acquire the dot fast and consistent even if you're slightly off center. Spend no time looking for the reticle or get lost in the window during follow up shots.

Easier Battery Access - Load/Replace battery right from the top! No sight removal or re-zero required

Better Follow Up - Reacquire sight after follow-up shots muzzle flip without losing the dot inside the window.

Same RMR mounting footprint - Using the exact Trijicon RMR mounting footprint keeps everything compatible without having to buy special accessories.

Read Trijicon SRO Detailed Review

trijicon sro show off

Holosun 507C X2 - Best Overall

fn509 ls edge with holosun 507c x2

Why people love Holosun 507C X2 - The Holosun HE507C X2 does the same thing the original model does but better in every way that improved the shooting experience while still remains affordable.

Uses RMR Footprint - No special adapter or milling required! Just use the same Trijicon RMR adaptor plate that comes with the FN 509 Tactical.

Bigger Buttons - Adjustment buttons in the dark or day easily even with big fingers

Near Infinite Battery life - 50,000 hours of battery life plus solar panel backup power if the battery goes out.

Side Loading Battery - This eliminates the need to remove the sight for battery swap and re-zeroing. Access the battery from the side tray

Solar Power BackUp - Solar fail-safe power kicks in immediately when the battery dies, so the optic will always remain on and ready.

At this price point, which is the lowest it's ever been for a Trijicon RMR alike sight, You'll save a ton of money. Just make sure to click the button below for the best deal.

Read Holosun 507C X2 Detailed Review

Vortex Venom - Best Value

vortex venom red dot sight adjustment buttons

Why we pick this one - The Vortex Venom is a entry level (3 or 6 MOA sold separately) rapid target acquisition sight just like the Leupold DeltaPoint Pro. Without spending over $300, this is a rock solid optic for range use and competition.

Top-Loading Battery Access - Install battery right from the top without removing the whole sight or having to re-zero the sight afterwards

Multiple Intensity Settings - Rapid target engagement under a full range of lighting conditions

Wide Field of View - Thin lens hood frame doesn't obscure the shooter's field of view for better sight acquisition and not lose the dot.

Super Lightweight - Weighing only 1.1 oz built with rugged aluminum housing, helps for high speed shooting

Read Venom Review


Common FAQ

FN 509 Tactical, LS EDGE Optics Compatibility

fn509 ls edge optic ready slide cut

The FN Low Profile Optics Mounting System is compatible with almost all micro red dot sights on the market.

The included package contains mounting plates and screws for some of the most popular optics such as:

  • Vortex Viper, Razor, Venom
  • Docter Optic
  • Trijicon RMR, SRO
  • C-More STS2
  • Burris
  • Leupold DeltaPoint Pro

Best FN 509 Slide Milling Service

Fn 509 tactical trijicon rmr gif

If you have the non optic ready FN 509, you can send the slide the following companies to get worked on: 

  • Chpws
  • ATEI
  • PMM
  • Jagerwerks

They are by far the best quality slide milling services with the best craftsmanship at a decent price.

Skip The Wait & Buy Optic Ready FN509

fn 509 LS edge with trijicon rmr

Buy optic ready FN 509 Tactical or FN 509 LS Edge.

No wait time, they're optic ready right out of the box!


Ying Xu

US Air Force veteran nuclear weapon officer. Aerospace engineering bachelor's degree from the University of Kansas. Experienced as a certified NRA range safety officer. Working as a search engine expert for BadAssOptic.com