Your resources for installing your JAG composites handguard system. Installation instruction are the same for the Ultralight and SFH handguard systems. Download the installation manual, view our installation video, or follow step by step instructions on this page. All options are available below.
WARNING: The barrel nut should be installed by a competent gunsmith
1. Apply anti-seize grease to the threads of your upper receiver.
2. Insert barrel into the upper receiver making sure that the index pin on the barrel fully seats into the upper receiver.
5. Set torque wrench to 30 ft.-lbs. of torque and attach the crows foot wrench onto torque wrench.
6. Torque barrel nut to 30 ft.-lbs.
9. After the barrel has been torqued the final time attach the barrel nut alignment jig to the barrel nut using the included nylon screws. You will want to position it such that the spring-loaded pin will fall into the gas tube hole as you apply torque. (There is a video on the site that clarifies this step further).
11. Apply torque until you feel the spring-loaded pin in the alignment jig engage the gas tube hole of the upper receiver.
