B5 Systems AR-15 M-LOK Carbine Length Polymer Handguard

The B5 Systems AR-15 M-LOK Carbine Length Polymer Handguard is a drop-in two-piece replacement that ditches the factory clamshell design in favor of a slim-profile, ergonomic rail system. If you run an AR platform rifle and want more modular attachment points without adding weight or complexity, this handguard delivers six sides of M-LOK slots across its length, letting you mount lights, foregrips, sling attachments, and other gear exactly where you need them.

Built from durable composite material with a stamped aluminum heat shield integrated into the design, this carbine-length handguard is built to take abuse. The slim diameter makes it comfortable to shoot for extended sessions, and the built-in handstop gives you a natural reference point for your support hand. At just 3.90 oz, it won't throw your balance forward, and it plays nice with both round and triangle-style handguard caps if you're swapping between setups.

Drop-in fit means no permanent modifications to your receiver—pull the delta ring and cap, slide this on, and you're done. Available in all standard colors, so you can match your rifle's aesthetic or blend it into your preferred finish scheme. Whether you're setting up a duty rifle, a competition build, or a reliable field gun, the B5 M-LOK gives you the modularity and ergonomics of a modern handguard without unnecessary bulk.

Key Features

• Drop-in two-piece design—no permanent modifications required
• Six sides of M-LOK attachment points for lights, grips, and accessories
• Slim-profile ergonomic diameter for comfortable shooting
• Built-in handstop for natural hand placement
• Integrated stamped aluminum heat shield
• Durable polymer construction
• Compatible with round and triangle handguard caps
• Lightweight at 3.90 oz
• Available in standard colors

Specifications

Frequently Asked Questions

Will this handguard fit my AR-15?

Yes, this is designed as a drop-in replacement for standard AR-15 rifles with a carbine-length gas tube. It replaces the factory clamshell handguard using the existing delta ring and cap assembly—no modifications needed.

Can I mount lights and other accessories to it?

Yes. The handguard features six sides of M-LOK slots, so you can attach M-LOK compatible lights, foregrips, sling mounts, and other gear in any configuration you need.

What handguard caps does it accept?

The handguard is compatible with both round and triangle-style handguard caps, so you can use either type depending on your setup or preference.

How much does it weigh?

The carbine-length version weighs 3.90 oz, keeping your rifle's balance point close to the receiver without adding unnecessary bulk.