Tick Tick ... Boom! ๐ฅ .300BO Assembly.
This guide details the step-by-step assembly of a .300 Blackout AR pistol, covering both upper and lower receiver components. It emphasizes proper installation of critical parts like the barrel nut, gas system, bolt carrier group, and lower receiver internals. The process concludes with mating the receivers, performing a function check, and securing the castle nut, offering practical instruction for DIY firearm builders.












