Mossie Tactics has teamed with Battle Comp to produce and distribute their new MT 2400 FSB light mount. This mount places any Surefire X300 or similar light in front of the FSB, which may negate the need for a rail for many shooters. It places the light out farther than a standard rail, which greatly reduces barrel shadowing.
The mount is simple to install, and only uses two screws along with the included allen wrench. Slide the mount over the FSB, tighten the lower screw, then the upper, and you are done. Verify the light mount is level, and if needed adjust your screws. If you can't do this, you probably can't load your own magazines.