FN 509 & 503

Description

Adjustment procedure

Adjustment of the sight is quite simple. For windage, the set screw on the left side of the base is loosened with the included .050” hex key, and as previously mentioned, simply repositioned with a punch (punch should have blunt flat face and contact only the dovetail area). For elevation, use the same .050” hex key (or anything small and pointed – toothpicks work well) to depress the detent plunger on the right side of the base and twist the sight blade counterclockwise to raise the point of impact, clockwise to lower. Release detent to lock blade at the proper position.

Installation

Please do not use a sight pusher, and always wear eye protection.

This sight will fit the factory dovetail cut. The factory fixed rear sight is to be driven from the dovetail (usually left to right) with the proper punch. Don’t forget to use eye protection. The MMC sight is then fit to the slide by flat filing the ribs on the bottom of the dovetail until a tight interference fit is achieved. The left side set screw provides additional security.

Sight notch is .125” wide x .090” deep

Available in:

Tritium and fiber optic versions will soon be available.