M4A1 rifles The M4A1 rifle, which uses 5.56x45 mm NATO ammunition, is often compared to its civilian version known as the AR-15. It is characterised mainly by a 14.5-inch barrel, although 16-inch ...

The M4/M4A1 5.56mm Carbine is a lightweight, gas operated, air cooled, magazine fed, selective rate, shoulder fired weapon with a collapsible stock. It is now the standard issue firearm for most ...

The Swedish Armed Forces have decided to acquire 15,000 Colt M4A1 rifles from the USA in response to the obsolescence of weapons used from the 1980s and 1990s. The new equipment will be assigned ...