Concept art M4
Mk 18 Mod 0 CQB-R with an Aimpoint CompM2 sight. Replaces the "M-16 Assault Rifle" on Lt. Rocky's L4D1 animation port.
Please don't mind the screenshots! They are showing the AK replacement from the Workshop, but the compiles are otherwise identical, except the shorter reload animation.
The gun appearing on the concept art/posters appears to be a short-barreled M4 with a Crane stock and a railed handguard, and the "M4A4" in Global Offensive appears to be the actual model used in those concept art pieces. The Aimpoint sight is borrowed from Twinke's HK416 Redux Pack from Gamebanana. Complaints, suggestions, and applications are welcome, as is constructive criticism.
Credits:
Mk 18 model/textures: Valve
Aimpoint model/texures: Twinke Masta/Anti-Death/Soul-Slayer/Stoke/TheLama/AcidSnake/Thanez
Animations: Valve (ported from L4D1 by Lt. Rocky)
Compile: Alex_D_Vasilkov
Sounds: NONE, pick any of your choosing