What innovative marketing claim did Colt use when first promoting the AR-15/M16 rifle to military officials in the early 1960s?

The Vietnam War era saw one of the most significant product launches in military history. The M16 rifle represented a radical shift in military arms design and marketing, eventually becoming the standard service rifle for the US military and many allies worldwide. This poll tests your knowledge about this iconic weapon's introduction and the marketing strategy behind its adoption.

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It was marketed as a "self-cleaning" rifle that didn't require regular maintenance
It was promoted as having the same reliability as the M14 but at half the production cost
It was advertised as the first rifle designed specifically for jungle warfare conditions
It was marketed as the first rifle that could be fully operated and field-stripped without tools