Owner’s Manual 2020

AND USE WILL RESULT IN DAMAGE TO THE SUPPRESSOR

OR MUZZLE DEVICE AND PISTOL, AND COULD RESULT IN

INJURY TO THE SHOOTER OR THOSE NEARBY. THE BORE OF

THE SUPPRESSOR OR MUZZLE DEVICE MUST ALIGN WITH

THE BORE OF THE BARREL. IF THE PISTOL IS FIRED WITH

THE SUPPRESSOR OR MUZZLE DEVICE MISALIGNED THE

SUPPRESSOR OR MUZZLE DEVICE WILL BE DAMAGED, THE

PISTOL MAY ALSO BE DAMAGED AND COULD RESULT IN

INJURY TO THE SHOOTER OR THOSE NEARBY.

Select a suppressor or muzzle device that is rated for use with the caliber

of your FN 509; the caliber is marked on the back of the barrel and is

visible through the ejection port. Use only suppressors or muzzle devices

compatible with the thread pattern on the FN 509.

To install a suppressor or muzzle device on your FN 509:

1. Remove the thread protector from the muzzle of the pistol. The thread

protector is attached with right-

hand threads and should be

removable without tools.

(Figure 73).

2. Choose your suppressor or

muzzle device and follow the

manufacturer’s instructions to

ensure the suppressor is in good

working condition and is

appropriate for use on your FN

509. The suppressor or muzzle

device must be equipped with ½"- 28 right-hand threads to be

properly installed.

FIGURE 73