THE WAY RAILS OUGHT TO BE.
Heavy. Bulky. Complicated. Proprietary. These are all-too-common ways to describe major contenders on the rail market these days. Unfortunately, this has become the norm and continued "progression" in the development of rail interface systems has only made things worse. If all of these systems are so robust and impossible to rotate, why do so many of them eventually arrive at the use of a proprietary receiver set with some kind of keyed interface? Rather than relying on one of these complex systems, the M4P™ suite of rails reverts to the simplicity of a timed barrel nut and torque.
The M4P™ rail is the result of almost two years of design and testing. Being our first "native" part being a unique design truly from the ground up, it was important to ensure that it would be worth the effort. As such, every corner of the rail system is tailored with strength and configurability in mind. Unlike most rails out there on the market, the Mk1 rails have a 0.10" wall thickness that adds material where it matters. Generally speaking, the standard specification for M-LOK® rails is Magpul's minimum of 0.08". While this is serviceable, it is oftentimes a compromise needed to keep weight down to account for complicated mounting systems that require a lot of material. This wall thickness increases the rigidity of the handguard without necessitating a compromise like an extended barrel nut to reduce leverage.
Underneath the rail is your choice of a 4140 steel or 7075-T6 Aluminum barrel nut; both require a timed installation with included shims that is done using a standard castle nut wrench like the FCD JCW or a common armorer's wrench. Both are equal in terms of durability when installed. However, as many have begun to notice over the years as Aluminum barrel nuts have become more prolific, there is a significant difference between in the conductivity of heat between the two materials. While the Aluminum barrel nut is less than half the weight of the steel variant, there is a noticeable acceleration in heat build-up and dispersion across the rail. We offer both versions to make a decision depending on your priorities for the build: reduced heat on the contact surfaces of the rail over sustained strings of fire with the steel barrel nut or the reduction in weight with the Aluminum.
On the outside is are seven sides of staggered M-LOK® attachment. This leaves plenty of room for the end-user to configure their accessories to match their system needs while also reducing stacking "negative" or "empty" sections along the profile of the rail. 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.
With a lightweight, robust mounting system, improved rigidity with smart material placement, and lengths optimized for 11.5, 12.5, 14.5, and 16" barrels, the Mk1 rail has been meticulously designed to improve any build in just about any application.
WHAT’S INCLUDED
(1) M4P™ Mk1 Rail
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