: 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.
: Snap ring pliers for delta ring assembly and anti-seize compound for lubricating receiver threads. Critical Technical Procedures
: Explores technical myths, advanced troubleshooting, and "under the hood" performance optimization. Gunsmithing - The AR-15
: Resources like those written by Chris Bartocci (author of Black Rifle II ) provide specialized instruction on the cycle of operations, gauging for depot-level maintenance, and troubleshooting for the entire AR15/M16/M4 family. Essential Tools & Specialized Gear
: A set of roll pin starter punches and standard punches to install pins without damaging the receiver. : An armorer’s wrench for castle nuts and
: Beginners must be aware of ATF definitions, such as the "26-inch rule" (overall length) and the minimum 16-inch barrel length requirement for rifles.
To perform professional-level work, specific tools are non-negotiable: : Resources like those written by Chris Bartocci
: Focuses on basic maintenance, repair, and accessorizing.