What if, in 1960, the US had decided to just scale the M2 carbine to handle 300 Savage, or maybe just a 30 cal. equivalent to 7.62x39? What if that gun had been upgraded with synthetic furniture and better provision for optics? How would that have changed things in the early part of the Vietnam conflict - when the M14 kinda washed out?
Would that have meant that there was no real reason to adopt that Mattel gun AR-15 thing?

Would that have meant that there was no real reason to adopt that Mattel gun AR-15 thing?
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