The war over accessory interfaces is over. M-LOK® has cemented itself as the de facto industry standard through both commercial and military ubiquity. Even so, the quad rail persists. There are hundreds of flavors of rails that have attempted to marry the two, but the QRM™ rail is truly the first of its kind that gives the end user native compatibility with both mounting standards across the full-length of the rail. As an added bonus, the combination of the dual-wall construction, M-LOK™ slots, and lightening cuts work together to form a fantastic ventilation system that keeps the gripping surface of the 1913 rail sections cool while the barrel and inner structure heat up. Using our new proprietary M4P™ rail interface that uses a timed barrel nut and eight countersunk fasteners rather than a complicated clamp or wedge mechanism, the QRM™ rail is the ultimate in both configurability and durability.
The 4140 steel barrel nut can be installed using a standard castle nut wrench like the FCD JCW or a common armorer's wrench.
In addition to the M-LOK® on the major mounting surfaces, there are also three slots located on the top offsets toward the front end of the rail for mounting popular light bars like those from Arisaka Defense. The rest of the offsets are occupied by scalloped lightening holes to shave some weight from the design. Along the top rail, there are three features that improve accessory mounting and handling. First, there is a scallop that runs the full length of the top 1913 rail that enhances grip and leverage with a c-clamp grip while also providing space to tuck wiring underneath switches to keep them out of the way. Second, there are ovular holes along the length of the top rail for running zip-ties or other fasteners to secure top-mounted accessories and/or wiring. Lastly, the front end of the rail has smoothed edges and radii to reduce snag hazards.
(1) M4P™ Mk2 QRM™ Rail
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