Installing an AR-15 Barrel

by
posted on May 24, 2011
d10764.jpg

Parts

BarrelBarrel nut

Tools

DPMS Multi-Tool or other barrel wrenchBrownells upper-receiver action block with insertTorque wrench with 1⁄2-inch driveBench-mounted vise

The YHM free-floating fore-end I chose for this build came with a barrel nut. The following instructions are for installing the barrel using this hardware and are typical for fore-ends of this type. However, the process may vary a bit with other models.

Image
The Brownells upper-receiver action block and insert help secure the upper for installing the barrel and other components. Put the insert in the action, put the action in the block and clamp the block in a vise.

Slide the action-block insert inside the receiver to support it and prevent distortion under pressure. Then clamp the receiver in the action block, and secure the works in a bench-mounted vise.

Clean the receiver threads with a small brush, and coat them with an anti-seize compound or high-quality grease. Insert the barrel through the front of the receiver. Thread the barrel nut onto the receiver with the wide, threaded portion to the rear. Tighten the barrel nut using a DPMS Multi-Tool or other barrel wrench.

The Multi-Tool is designed to be used with a 1⁄2-inch-drive torque wrench. The mil-spec tightening technique is as follows: Torque to 35 foot-pounds. Loosen. Torque again to 35 foot-pounds. Loosen again. Torque past 35 foot-pounds, until the next hole in the nut aligns with the gas-tube hole in the receiver, but do not exceed 80 foot-pounds.

Image
After aligning the barrel with the receiver and installing the barrel nut, use a torque wrench in conjunction with a barrel wrench to properly tighten the nut.

Latest

Springfield Armory SA-35
Springfield Armory SA-35

First Look: New Colors Options For The Springfield Armory SA-35

Now available in Coyote Brown or Tactical Grey. 

First Look: XS Sights MOS Sight Bundles

Available for the RMR and Acro footprints.

FN Awarded Contract for M240 and M249 Machine Gun Barrels

Large amounts of rounds fired creates a need for new barrels.

Rifles: Pulling the Wool Over Our Eyes?

Time for moving on, and we’re not foolin’.

First Look: 22 ARC Options From Bear Creek Arsenal

New ways to extend the reach of your AR-15.

First Look: JK Armament 155 RPX Suppressor

Adaptable to a wide range of pistol and rifle calibers.

Interests



Get the best of Shooting Illustrated delivered to your inbox.