Description
Got an M-LOK handguard and a Picatinny accessory that won't play nice together? This little rail section from CMC Triggers is the bridge. It bolts straight into your M-LOK slots and gives you a true 1913 Picatinny surface, so lights, vertical grips, hand stops, and other rail-mounted gear have a rock-solid home. At 2.5 inches with five slots, it's just enough real estate for a single accessory without hogging space on your forend.
CMC machines these from 6061-T6 aluminum and finishes them with a Type III hardcoat anodizing in matte black, which is the same tough treatment you'll find on quality handguards. That means it shrugs off rail-mounted lights and grips getting bumped around without wearing through. The beveled ends are a nice touch too, keeping the edges from catching on slings, gloves, or your gear bag when you're moving around.
Where the CMC M-LOK Picatinny Rail Earns Its Keep
The beauty of a modular M-LOK setup is running a slick, snag-free handguard and only adding rail where you actually need it. This section lets you do exactly that. Mount one at 3 o'clock for a light, drop one at 6 o'clock for a grip, or add a short stretch of Pic wherever your build calls for it. It works with any M-LOK compatible handguard or forend, whether it's aluminum or polymer.
What Comes With the CMC 5-Slot Rail Section
Everything needed to mount up is in the package. You get the rail itself along with the mounting screws and M-LOK T-nuts, so there's no hunting for extra hardware before you can install it. The whole thing tips the scale at right around 0.9 ounces, so you're adding a mounting point without noticeably adding weight to your rifle. Made in the USA by a Texas-based, family-owned outfit that's built its name on quality AR parts.
Key Specifications
- Manufacturer: CMC Triggers
- Manufacturer Part Number: 81722
- UPC: 810943030022
- Model: M-Lok Picatinny Rail 5 Slot
- Slots: 5
- Length: 2.5 in
- Width: 0.8 in
- Height: 0.4 in
- Weight: 0.9 oz
- Material: 6061-T6 Aluminum
- Finish: Type III Hardcoat Anodized, Matte Black
- Color: Black
- Style: Picatinny (1913 Spec)
- Fit: M-LOK Compatible Handguards and Forends
- Country of Origin: USA
What’s Included
- 1x CMC Triggers M-LOK Picatinny 5-Slot Rail Section
- 2x Mounting Screws
- 2x M-LOK T-Nuts
Frequently Asked Questions
Will this CMC rail fit any M-LOK handguard?
Yes, it's designed to work with any M-LOK compatible handguard or forend, whether it's aluminum or polymer. The included T-nuts and screws lock it into the M-LOK slots for a secure fit. As long as your handguard uses the standard M-LOK slot pattern, you're good to go.
What can I mount on this 5-slot Picatinny section?
It gives you a standard 1913 Picatinny surface, so it accepts most rail-mounted accessories like weapon lights, vertical grips, hand stops, and pressure switch mounts. With five slots and 2.5 inches of length, it's sized right for a single accessory. If you need more real estate, CMC also makes this rail in 3-slot and 7-slot lengths.
Does the CMC M-LOK Picatinny rail come with mounting hardware?
It does. The package includes the mounting screws and M-LOK T-nuts needed to attach it directly to your handguard, so you won't need to source anything extra. Just grab an Allen wrench and you can have it installed in a couple of minutes.
How much weight does this add to my rifle?
Very little. The 5-slot section weighs right around 0.9 ounces since it's machined from lightweight 6061-T6 aluminum. That's the whole point of a modular M-LOK setup, adding rail only where you need it without loading down the gun.





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