🛠️ Invention or technique

Small-calibre high-velocity rifle (AR-15 / M16)

Fusil de calibre reducido y alta velocidad (AR-15 / M16)

Date
1957-1964 · confidence high
Place
Los Angeles, California, United States
Credited to
Eugene Stoner (ArmaLite) and Colt
Field
Conflict

What it is

A light assault rifle of aluminium alloy and polymers, firing the high-velocity, low-recoil .223 (5.56 × 45 mm) cartridge. Adopted by the US in 1964 as the M16, it spread small calibre across almost all NATO armies.

Stoner's design started from the AR-10 (1955); the M16's initial failures in Vietnam (powder changes, no cleaning kits) caused much criticism.

What it led to

  • the NATO 5.56 × 45 cartridge
  • assault rifles such as the M4, SA80 and FAMAS
  • lightweight polymer small arms
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Sources✓ verified 2026-11-04