Owner’s Manual 2020

Many optics will allow for use of the existing iron sights. If the optic that

you have chosen allows this functionality, the optic can be adjusted to

match the point of impact of the iron sights closely by adjusting the aiming

point of the optical sight to coincide with the aligned iron sights.

Slide Cap/Sight MRD Plate MRD Insert Screw set

Slide cap 1 - 501 N/A 515

Leupold DeltaPoint Pro 1 - 501 505 510

Trijicon RMR 2 - 502 506 511

Docter Optic 3 - 503 507 512

Vortex Venom 3 - 503 507 512

Vortex Viper 3 - 503 507 513

Vortex Razor 4 - 504 N/A 514

C-More STS2 4 - 504 N/A 514

Burris 3 - 503 507 512

11.6 SUPPRESSOR AND MUZZLE DEVICE INSTALLATION AND USE

(APPLICABLE ONLY TO PISTOLS WITH THREADED BARRELS)

FN 509 pistols with threaded barrels are threaded with ½"- 28 right-hand

threads and allow the pistol to be equipped with a suppressor or muzzle

device. It is imperative to use a suppressor or muzzle device that is

appropriate for use to ensure safe functioning.

THE SUPPRESSOR OR MUZZLE DEVICE MUST HAVE A BORE

LARGE ENOUGH TO ACCOMMODATE THE CARTRIDGE TO BE

FIRED. A SUPPRESSOR OR MUZZLE DEVICE INTENDED FOR

USE WITH A CALIBER SMALLER THAN THE CARTRIDGE THAT

THE PISTOL IS CHAMBERED FOR IS DANGEROUS TO USE