It's the M4A1-S from Global Offensive, but without the suppressor.
I uploaded a CSGO weapons pack, which included the suppressed version of the M4A1-S, but not the unsuppressed version, that's why I'm uploading it separately.

Includes:
-M4A1 (Obviously :P)
-Updated HUD icon (trying to imitate the CSGO HUD)
-10 alternate workshop skins.

By the way, if you want to use a skin included in this download with the suppressed M4A1 instead, you can apply it by just replacing the wtd in OpenIV.

Also, I'm going to release each weapon individually, to include skins for each weapon and a updated HUD so all weapons can have the same HUD.

Thanks for downloading this mod!