This canted Rail Piece is very easy to install to M-LOK Rail System by loosening the Wing Nuts on the rear of the mount, sliding them into the M-LOK Rail Slot and tightening the Allen Keys until the Rail Piece grabs the M-LOK slot securely. You can then mount any 20mm accessory you like on the Rail Piece, however it is particularly suited to an offset Torch/Laser so that it is as close to your muzzle as possible. Alternatively, this Rail Piece is great for offset Red Dot Sights, especially if you use a magnified optic primarily on your replica.