Tech Tip: Installing the BCM M13 Raider Handguard

Published on April 2, 2025
Duration: 15:42

This guide details the installation of the BCM M13 Raider handguard, emphasizing the importance of proper barrel nut torque and the unique screw system for securing the handguard. The process involves greasing critical components, torquing the barrel nut multiple times to ensure thread marriage, and then carefully installing the handguard with its specialized screws and anti-rotation tab. The video highlights the handguard's rigidity and lightweight construction.

Quick Summary

The BCM M13 Raider handguard is a rigid, lightweight option weighing under 12 ounces, constructed with a double-walled extrusion. Installation involves greasing the barrel and barrel nut threads, torquing the barrel nut to 40-50 ft-lbs after a thread-marrying cycle, and securing the handguard with specialized screws torqued to 30-40 inch-lbs.

Frequently Asked Questions

What are the key features of the BCM M13 Raider handguard?

The BCM M13 Raider handguard is known for its exceptional rigidity and lightweight design, achieved through a double-walled extrusion. It weighs under 12 ounces and features a robust mounting system that enhances stability.

What is the correct torque procedure for the AR-15 barrel nut when installing a BCM handguard?

For BCM handguards, first torque the barrel nut to 35 ft-lbs. Then, unscrew and retighten it to 35 ft-lbs four times to marry the threads. Finally, tighten to the specified 40-50 ft-lbs.

How do you install the specialized screws for the BCM M13 Raider handguard?

The handguard uses two screws: one scalloped-head screw that needs to be indexed to align with the handguard's anti-rotation features, torqued to 30-40 inch-lbs. The other is a standard flat-head screw, also torqued to 30-40 inch-lbs.

Why is greasing the barrel and barrel nut threads important during AR-15 handguard installation?

Greasing the barrel and barrel nut threads ensures smooth installation and proper torque readings. It also helps prevent galling and ensures the threads marry correctly during the torquing process, leading to a more secure fit.

More Gunsmithing & DIY Videos You Might Like

More from Brownells, Inc.

View all →