Ar-15: Gunsmithing - The

: Focuses on basic maintenance, repair, and accessorizing.

: Requires indexing the barrel stud to the receiver's groove and repeatedly tightening/loosening the barrel nut to properly seat the threads before final torquing.

: Explores technical myths, advanced troubleshooting, and "under the hood" performance optimization. Gunsmithing - The AR-15

: Using a gas tube alignment gauge is recommended to ensure the gas tube enters the receiver freely without binding against the barrel nut. Safety & Compliance

Whether you are an aspiring armorer or a DIY enthusiast, mastering the AR-15 platform offers a deep dive into the world of precision engineering and firearm maintenance. This guide looks into the essential resources, tools, and technical procedures required for professional-grade AR-15 gunsmithing. : Focuses on basic maintenance, repair, and accessorizing

: An armorer’s wrench for castle nuts and barrel nuts, plus a high-quality torque wrench to ensure the barrel is seated within the required range of 30 to 80 foot-pounds.

To perform professional-level work, specific tools are non-negotiable: : Using a gas tube alignment gauge is

: An illustrated, step-by-step guide by Rob Reaser that breaks down primary groups—upper receiver, lower receiver, and bolt carrier group—into detailed component assemblies.