B5 Systems Ar-15 Mid-Length Handguard M-Lok Od Green

The B5 Systems AR-15 Mid-Length Handguard M-Lok in OD Green is a two-piece drop-in replacement designed to modernize your AR platform rifle with real ergonomic improvements and genuine modularity. If you're running a mid-length gas system and tired of the limited mounting options and chunky profile of a standard clamshell handguard, this is a straightforward upgrade that gives you six sides of M-LOK real estate without requiring permanent modifications to your upper receiver.

Built from durable composite material with an integrated stamped aluminum heat shield, the B5 mid-length handguard trades unnecessary bulk for a slim diameter profile that doesn't get in the way of your natural grip. The handguard ships with a built-in handstop—no extra purchase needed—and accepts both round and triangle-pattern handguard caps, so it plays well with your existing setup or lets you customize it later. At just 5 ounces and 9 inches long, it's proportioned for mid-length gas tubes without hanging off the end of your receiver or adding weight you don't need.

OD Green is a practical color choice for hunters, range shooters, and carbine-focused builders who want their gear to blend rather than announce itself. The composite construction resists the dings and wear that come with real use—truck beds, field carry, and carbine competition—while the M-LOK attachment points let you add lights, sling mounts, or tactical accessories exactly where you need them, not where the manufacturer guessed.

Key Features

• Two-piece drop-in design—replaces standard handguard without permanent modifications
• Six sides of M-LOK attachment points for lights, slings, and accessories
• Built-in handstop keeps your hand in a consistent shooting position
• Slim diameter profile for natural, ergonomic grip
• Integrated stamped aluminum heat shield protects your hand from barrel heat
• Accepts both round and triangle handguard cap patterns
• Composite construction stands up to field use and training cycles

Specifications

Frequently Asked Questions

Will this handguard fit my AR-15?

This is a mid-length handguard, so it's designed for AR-15 rifles with mid-length gas systems. It's a drop-in replacement that doesn't require any permanent modifications to your upper receiver. Verify your gas system length before ordering.

What's the difference between M-LOK and other mounting systems?

M-LOK uses a series of slots milled into the handguard itself to accept low-profile mounting hardware. Unlike Picatinny rails, M-LOK doesn't add weight or bulk, and it gives you mounting options on six sides of this handguard—top, bottom, and all four sides.

Does this include everything I need to install it?

This is a drop-in handguard designed to replace your existing one. Installation typically requires removing your current handguard and securing the new one. The handstop is built in, and the handguard accepts standard round or triangle handguard caps.

Why is the composite construction better than aluminum?

Composite materials are lightweight, durable, and naturally insulating—meaning the heat shield keeps your hand more comfortable during sustained fire. The slim profile is also easier to manage than heavier aluminum designs, and it resists the kind of dings and corrosion that come with field use.