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The U.S. Military's standard issue assault rife, fires 5.56x45mm ammo. Developed to replace the M-14 Rifle that fired larger heavyer 7.62x51mm round. The original M-16 was first issued in Vietnam in 1965 and was prone to jamming because of the gunpowder used in the bullets, the fact that no cleaning kits were issued at first, also the soldiers using them were told it was so "space age" that it didn't need to be cleaned. It was also the first assault rifle issued en-masse to use plastic/fiberglass parts.
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