https://www.artstation.com/artwork/qAzBaz The M4 carbine is a shorter and lighter variant of the M16 assault rifle. 5.56×45mm NATO, AR15 style gun used by the United States Armed Forces . Poly-count is a bit high because of the killflash detailed mesh. Consider removing it for quicker render times. Body of the carabine was made to some extend with modified parts of m4/ar15 models made by cgcookie (CC-BY), Mephisto (CC-BY-SA), CGMasters (CC-BY), frodovial (CC-BY), from Blendswap. Thanks for sharing!