12.5" is the Bastard Sword of ARs
This video explores the intricacies of building and tuning AR-15 rifles with 12.5-inch barrels. The creator highlights that while this barrel length can be a 'sweet spot' for velocity, optimizing gas systems for suppressed and unsuppressed use is more challenging compared to more common barrel lengths. It questions the traditional carbine vs. mid-length gas system debate for this specific barrel configuration, suggesting neither is definitively better. The description encourages viewers to watch before embarking on a potentially 'half-baked' build, implying a need for deeper understanding of the technical challenges involved.









