This video clarifies the distinction between AR-15 and M16 designations, explaining that M16/M4 are US government designations for AR-15 platform rifles. It details how Colt initially used 'AR-15' for its commercial line while the government adopted 'M16' for selective-fire variants. The video also touches on the M4 designation and its trademark history, emphasizing that the core internal operating system defines an AR-15, regardless of external markings or selective-fire capability.
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