Ep 1 | EVERYTHING You Need To Know BEFORE You Build, Buy, Or Convert PCCs | Ultimate AR9 Build Guide
This guide, presented by C.J. of AT3 Tactical, offers an expert overview of building or acquiring a 9mm AR-style rifle (AR9). It details the unique components differentiating AR9s from AR15s, discusses historical context, explores magazine and operating system choices, and outlines the paths to AR9 ownership: conversion, purchase, or custom build. The instruction emphasizes understanding the specific parts required for reliable function, particularly concerning Last Round Bolt Hold Open (LRBHO) and blowback systems.













