User Ratings
No ratings yet
Be the first to review this product
Upgrade your FN 509 with the compensator accessory kit. The compensator features a quick-detach (QD) design for tool-less install and removal from the proprietary non-threaded QD barrel, requiring no gunsmith or factory service. The FN Compensator significantly reduces felt recoil and uses v-style ports on both sides to vector gases and muzzle flash out of the shooter's field of view, delivering a flatter, more controlled shooting experience with a consistent sight picture from shot to shot.
Specifications
- Manufacturer:
- Fn America
- Category:
- muzzle-device
- Caliber:
- 9mm Luger
- Length:
- 4.3"
- UPC:
- 845737018207
- MPN:
- 20-100806
- Required Component:
- No
Parts Cabinet
Track parts you own or plan to buy.
Where to Buy
Have one to sell?
Sponsored
MantisX
The smart way to train your AR build
Built your rifle — now train it. BlackBeardX installs in minutes and turns your AR into a full dry fire system with smart feedback on every pull.
Shop BlackBeardXPrice History
Current
$329.00
Lowest
$329.00
Highest
$329.00
Price Alert
Sign in to save a target price and receive an email when this component drops.
Sign In to Set AlertWhat's Included in this Bundle
Similar Products
SureFire 3-Prong Flash Hider 5/8-24 TPI
Surefire
$134.00
Wolfpack Armory Night Howler Recessed Flash Hider 1/2"-28 Nitride
Wolfpack Armory
$94.00
SureFire WARCOMP AR-308 Flash Hider 30 Cal 5/8-24 Stainless Steel Black
Surefire
$152.00
A2 BIRDCAGE Flash Hider
Unknown
$15.00
KAK Industry Plan B Universal Muzzle Device
Kak Industry
$37.99
SilencerCo ASR 3-Port Muzzle Brake 1/2x28 for 5.56 NATO AC142
SilencerCo
$79.99
Yankee Hill Machine Phantom 5.56mm Comp/Flash Hider YHM-28-5C1 Smooth Endcuts 1/2x28
Yankee Hill Machine
$28.03
Daniel Defense Flash Hider 1/2-28 AR-15 5.56/223 Suppressor
Daniel Defense
$51.00
Builds Using This Part
No builds yet — be the first to use this part.
Related Guides
Guide
The AK Platform: Core Design, Strengths, and Builder Tradeoffs
A practical AK overview covering operating system basics, parts ecosystem realities, and where the AK platform shines compared to AR-pattern rifles.
8 min read
Guide
AR-15 Armorer's Toolkit: What You Actually Need
A no-filler breakdown of the specific tools required for AR-15 armorer work, from trigger and grip swaps to barrel installation and headspace verification. What each tool does and why it matters.
7 min read
Guide
AR-15 Components: A Complete Reference Guide
A comprehensive overview of every major component in an AR-15 build—including what's inside bolt carrier groups and parts kits—organized by assembly for new builders.
12 min read