The Magpul MAG590-BLK M-LOK 5 Slot 1913 Picatinny Polymer Rail is a lightweight, cost-effective way to add Picatinny rail real estate to your M-LOK-compatible handguard or forend. At 2.5 inches long, this injection-molded polymer section accepts standard Picatinny-mount accessories—tactical lights, vertical grips, laser units, or other rail gear—without eating up space or weight on your rifle. Whether you're building a modern sporting rifle, tactical carbine, or reconfiguring an existing platform, this rail adapter bridges the gap between M-LOK slots and your favorite Picatinny accessories.

Built from Magpul's proprietary reinforced composite, the rail delivers the strength you need without the heft of aluminum. Beveled ends reduce snagging and eliminate sharp corners that catch on gear or terrain. The design includes recoil and impact mitigation lugs to help absorb forces and protect your rail-mounted optics and accessories. All fasteners needed to mount directly to M-LOK-compatible T-nuts are included in the box—no hunting for metric screws or adapters.

Made in the USA, this polymer rail is a smart add-on for shooters who've standardized on M-LOK but still want the versatility of Picatinny attachment points. It's especially useful if you're upgrading an older polymer handguard to modern accessory standards or filling in gaps on a new build without committing to full-length rail sections.

Key Features

• Direct M-LOK-to-1913 Picatinny adapter eliminates compatibility gaps
• 5 Picatinny slots in a compact 2.5-inch profile
• Reinforced polymer construction balances strength with minimal weight
• Beveled edges reduce snag points and sharp edges
• Recoil and impact mitigation lugs protect mounted accessories
• All necessary M-LOK fasteners included
• Made in the USA

Specifications

Brand	Magpul
Model	MAG590-BLK
Color	Black
Slot Type	M-LOK
Rail Standard	1913 Picatinny
Picatinny Slots	5
Overall Length	2.5 inches
Material	Reinforced polymer composite
Hardware	Included
Country of Origin	USA

Frequently Asked Questions

What M-LOK handguards will this rail work with?

This rail mounts to any M-LOK-compatible handguard or forend that accepts standard M-LOK T-nuts, whether aluminum or polymer construction.

What kind of accessories can I attach to the Picatinny slots?

Any standard 1913 Picatinny-mount accessory works on this rail—tactical flashlights, vertical grips, laser systems, backup iron sights, and other common rail-mounted gear.

Do I need to buy additional fasteners or T-nuts?

No. All fasteners necessary for attachment to M-LOK slots are included in the package.

Is this rail suitable for high-recoil rifles?

The rail is designed with recoil and impact mitigation lugs to help protect your mounted accessories in standard shooting conditions. For extreme environments, verify that your specific optic or accessory is also rated for your rifle's recoil impulse.