Addendum 2017

4. Free Float Handguard
The FN Wedge Lock Rail Assembly 14.625” light weight free-float forearm/rail is installed on the FN 15™ DMR II in place of the standard round
handguards. The wedge lock rail assembly extends over a low profile gas block. It allows for mounting of additional grips, sights, laser devices and
other accessories onto a rigid, free-float forearm. Additional M-LOK™ slots fill the rest of the top rail.
WARNING
Before installing any sights, lasers or other devices on the rifle, place the “safety” in the on safe position, remove the magazine, open the action
and ensure the chamber is empty as explained in Section 15.1 of your Owner’s Manual. Always keep the muzzle pointed in a safe direction.
Failure to follow these warnings may result in serious injury or death.
4.1 M-LOK™ Rail Installation
M-LOK™ accessory rails can be attached, not supplied, to the forearm assembly in multiple locations on the left, right and bottom sides. To install
an M-LOK™ rail to the forearm, first ensure the rifle is completely unloaded, completely clear and the safety lever is placed in the “on safe”
position as described in Section 15.1 of your Owner’s Manual. M-LOK™ rails will not fit under the gas block. M-LOK™ rails and accessories are
available directly from Magpul®. (www.magpul.com)
WARNING
Do not mount any sight, laser, or other device which interferes with normal operation of the rifle or extends beyond or in front of the muzzle.
Ensure any sight or device attached to this rail is firmly mounted.
CAUTION
Use care when disassembling the upper and lower receivers as described in Section 18.1 of your Owner’s Manual with the Wedge Lock rail
installed. Damage may occur to the rail and the lower receiver if done improperly. A pinch hazard may also be present.
4.2 Disassembly: FN does not recommend removing or disassembling the FN Wedge Lock Rail system for normal maintenance as it is installed
with retaining compound. It should remain attached to the upper receiver for normal maintenance.
When the rifle is disassembled as explained in Section 18.1, extra care should be taken when separating the upper and lower receivers. Because of
the mounting device on the rail, there is less clearance between the rail and the lower receiver. If the upper receiver is pivoted on the front take-
down pin as shown in Figure 20 of the Owner’s Manual, the rail may come in contact with the lower receiver causing damage to the rail, the lower
receiver and potentially pinching your hand. Please use caution.