This guide details the assembly of a custom bufferless AR pistol build, leveraging the Brownells BRN-180S upper receiver. The build emphasizes a short-stroke piston system for cleaner operation and compatibility with standard AR-15 lower receivers. It highlights the integration of accessories like the SB Tactical FS1913 brace, Nikon red dot, and Olight weapon light. The expert demonstrates advanced assembly techniques, including overcoming tight fitment tolerances with an Aero Precision lower.
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