A press released from Wright-Patterson Air Force Base quotes small arms program office senior logistics manager Merrill Adkison saying,
The Air Force bought the M9s back in the 1980s, and the design has not really changed since then. M9s are larger, heavier, all-metal pistols; whereas M18s are lighter polymer pistols with a more consistent trigger pull and adjustable grips for large and small hands.
Air Force Replacing Beretta M9 with 125,000 Sig Sauer M18s
The Air Force is replacing its aging Beretta M9 pistol lineup with 125,000 Sig Sauer M18s and they have "17-round and 21-round magazines."
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