The Magpul M-LOK Polymer Rail Section (Magpul part no. MAG590-BLK) is a black, 5-slot Picatinny rail section designed for use with any M-LOK compatible handguard or forend. Magpul injection molds it from a proprietary reinforced composite for strength and durability while keeping the section lightweight. It’s a cost-effective way to add 1913-spec Picatinny mounting space for a light, laser, or vertical grip exactly where you need it, rather than running a full-length rail down the whole handguard. Beveled ends reduce snagging on gear and eliminate the sharp corners a cut piece of aluminum rail would leave behind.

Key Specifications

• Provides 5 slots of Picatinny/1913-spec rail space.
• Designed for use with all M-LOK compatible handguards and forends.
• Offers a cost-effective way to attach rail-mounted accessories like lights or vertical grips.
• Injection molded from a proprietary reinforced composite for strength and durability.
• Built with a lightweight design.
• Features beveled ends that reduce snagging and eliminate sharp corners.
• Includes all hardware necessary for direct M-LOK attachment.
• Works on both aluminum and polymer handguards and forends.
• Measures 2-3/8 inches in length.

Frequently Asked Questions

How many slots does this rail section have? Five slots of Picatinny rail space.

Is mounting hardware included? Yes, all hardware necessary for direct M-LOK attachment is included.

Will this work on a polymer handguard? Yes, it’s compatible with both aluminum and polymer M-LOK handguards and forends.

Buy the Magpul M-LOK Polymer Rail Section

Running a full-length rail down your whole handguard is overkill when you only need Picatinny space for one accessory, and this 5-slot Magpul section gives you exactly that. Order from our Lubbock, Texas gun shop and it ships fast to your door, along with more gun accessories and parts.