Description
Arisaka Defense built this little rail section for folks who run M-LOK handguards but still need a chunk of true 1913 Picatinny to hang gear on. The whole idea is to keep things low. Instead of a tall rail block that pushes your accessory way up off the tube, this one sits close, which means whatever you mount rides tighter to the handguard for a cleaner, more compact setup. It's a small part that makes a real difference on a build where you're trying to keep the weight and bulk down.
What the Arisaka 3-Slot M-LOK Rail Brings to a Build
You get three Picatinny slots in a 1.37-inch package, with a height of just .277 inches over the mounting surface and a weight around 0.4 ounces. That short footprint is the sweet spot for smaller accessories where a full-length rail is overkill. Think a flip-up front sight, a light or laser mount, a hand stop, or a QD sling swivel base. The two-point M-LOK attachment does more than just hold it on too. It spreads the load from heavier accessories like a bipod or vertical grip across the slots, so you're not putting all that leverage on a single point.
Materials and Fit on the Low Profile Picatinny Rail
This is CNC machined from 6061-T651 aluminum and finished with MIL-A-8625 Type III hard coat anodizing, which is the tough matte black coating you want on a part that takes abuse. It ships with two Magpul M-LOK nuts and two 10-24 x 5/16 inch Torx button head screws. You'll need an IP25 or T25 Torx driver to install it, and that isn't included in the box, so grab one if you don't already have it in your kit. It's made in the USA and it also plays nice with the Arisaka Rail Slider if you run one, though any in-spec Picatinny accessory will clamp right on.
If you're building out a slick, lightweight rifle and just need a short stretch of Pic rail without the height, this is a clean, dependable way to get it done.
Key Specifications
- Manufacturer: Arisaka Defense
- Manufacturer Part Number: LPR-M-3
- UPC: 635963341787
- Product Type: Picatinny Rail Section
- Mount Interface: M-LOK
- Picatinny Slots: 3
- Length: 1.37 in
- Height Over Mounting Surface: 0.277 in
- Weight: 0.4 oz
- Material: 6061-T651 Aluminum
- Finish: MIL-A-8625 Type III Hard Coat Anodized
- Color: Black
- Installation Tool: IP25 or T25 Torx driver (not included)
- Country of Origin: Made in the USA
What’s Included
- Arisaka Low Profile M-LOK 3-Slot Picatinny Rail
- Two Magpul M-LOK nuts
- Two 10-24 x 5/16 inch Torx button head screws
Frequently Asked Questions
What tool do I need to install the Arisaka 3-slot M-LOK rail?
You'll need an IP25 or T25 Torx driver to tighten the two button head screws. That driver is not included in the box, so make sure you have one on hand before you start the install. The included hardware covers everything else you need to mount it.
Will this low profile Picatinny rail work with any M-LOK handguard?
Yes, it attaches to any standard M-LOK handguard or forend using the included Magpul M-LOK nuts and screws. The 3-slot version needs two open M-LOK slots to mount up. It's a good pick when you only need a short section of Picatinny rather than a full-length run.
Can I mount a bipod or vertical grip on the 3-slot Arisaka rail?
You can, though the 3-slot model is best suited for lighter, more compact accessories. The two M-LOK attachment points do spread the stress from heavier gear across the slots, but if you plan to run a bipod or grip long term, the 5-slot version gives you a third mounting point for even more support.
How low does the Arisaka Low Profile M-LOK rail actually sit?
It sits about .277 inches over the mounting surface, which is noticeably lower than a lot of standard rail sections. That reduced height pulls your accessory in tighter to the handguard for a slimmer overall profile. It's a nice touch on lightweight or compact builds where every bit of bulk matters.






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