FREE Microscale M4A1 carbine (Black and White versions) Instructions
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The M4 Carbine is a shorter and lighter variant of the M16A2 assault rifle. The M4 is a 5.56x45mm NATO, air-cooled, gas-operated, direct impingement, magazine-fed carbine. It has a 14.5 in (370 mm) barrel and a telescoping stock.
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