The Magpul M-LOK Aluminum Rail Section, 3-Slot is an aluminum Picatinny rail section that mounts directly into any M-LOK handguard slot.
The Magpul M-LOK Aluminum Rail Section, 3-Slot (MAG580) bolts straight to any M-LOK slot and gives you three slots of MIL-STD-1913 Picatinny rail for lights, lasers, older mounts or a hand stop. Machined from hard-anodized aluminum for a rock-solid, low-profile platform, it uses the M-LOK cam-lock system for a secure, repeatable mount and ships with the hardware you need to fit it.
How It Compares
The same section is also made in five-slot, seven-slot and nine-slot lengths if you need a longer mounting run.
Key Features
- 3 slots of Picatinny rail: mount rail accessories on an M-LOK forend
- Hard-anodized aluminum: rigid, hard-wearing, low-profile
- M-LOK cam-lock mount: secure and repeatable
- Hardware included: ready to fit out of the pack
Compatibility & Fitment
Fits any M-LOK-compatible handguard or forend, and provides MIL-STD-1913 Picatinny rail for rail-mount accessories. Handguards that are Picatinny-only or use a different slot standard will not take it, so check what your forend actually is before you buy. The M-LOK mounting hardware is supplied — fit it where the accessory needs to sit, torque it down and re-check after the first range trip.
What's Included
- Magpul M-LOK aluminum rail section (3-slot)
- M-LOK mounting hardware
Technical Specifications
Type | M-LOK to Picatinny rail section |
Material | Hard-anodized aluminum |
Finish | Black |
Length | 3 Picatinny slots |
Mount Interface | M-LOK direct-attach |
US Shipping & Support
Shipped from D&R Sports Center in the USA with fast, tracked delivery. Questions on fit, mounting or which model suits your setup? Our team is glad to help before and after your purchase.
Frequently Asked Questions
Will this rail section fit my handguard?
It fits any M-LOK-compatible handguard or forend, so the first thing to check is that your forend is genuinely M-LOK rather than Picatinny-only or a different slot standard. You also need a clear run of M-LOK slots long enough to take a three-slot section where the accessory needs to sit. If your handguard is already Picatinny along its full length, you don't need this at all.
What does an M-LOK rail section actually do?
It converts M-LOK slots into MIL-STD-1913 Picatinny rail, so accessories built for Picatinny will mount on an M-LOK forend. That covers lights, lasers, older mounts and a hand stop — anything with a rail clamp rather than a direct M-LOK footprint. It uses the M-LOK cam-lock system, which draws the section tight inside the slot for a secure, repeatable mount.
How many slots do I need, and how does this compare with the longer sections?
Three slots is the short option, enough for a single compact accessory where handguard space is tight. The same hard-anodized aluminum section is also offered in five-slot, seven-slot and nine-slot lengths when you need a longer mounting run or more than one accessory.
Is fitting it straightforward?
Yes — the M-LOK mounting hardware is supplied, so you position the section where the accessory needs to sit and torque it down. There are no permanent changes to the handguard and nothing gunsmith-level about it. It is worth re-checking the fasteners after the first range trip, as with any newly fitted rail hardware.
