Have you checked "game options"? I have COD 4 and I can turn it off there.
Your config file should be in the "players" file, you should be able to easily edit it there.
Here's a link to the Call of Duty francise wiki
http://callofduty.wikia.com/wiki/Developer_console
... AND...How to disable internal crosshair in this game? )
4K3D on passive LG OLED 4K TV 65C6V, GTX 1080 Ti, Win 8.1 64 Pro, i7-7700, 3D-Vision 2 on Benq LW61-LED PJ. HTC Vive. Panasonic Z-10000 3D Camcorder
Your config file should be in the "players" file, you should be able to easily edit it there.
Here's a link to the Call of Duty francise wiki
http://callofduty.wikia.com/wiki/Developer_console
4K3D on passive LG OLED 4K TV 65C6V, GTX 1080 Ti, Win 8.1 64 Pro, i7-7700, 3D-Vision 2 on Benq LW61-LED PJ. HTC Vive. Panasonic Z-10000 3D Camcorder
http://callofduty.wikia.com/wiki/File:Laser_in_MW2.png
Acer H5360 (1280x720@120Hz) - ASUS VG248QE with GSync mod - 3D Vision 1&2 - Driver 372.54
GTX 970 - i5-4670K@4.2GHz - 12GB RAM - Win7x64+evilKB2670838 - 4 Disk X25 RAID
SAGER NP9870-S - GTX 980 - i7-6700K - Win10 Pro 1607
Latest 3Dmigoto Release
Bo3b's School for ShaderHackers
4K3D on passive LG OLED 4K TV 65C6V, GTX 1080 Ti, Win 8.1 64 Pro, i7-7700, 3D-Vision 2 on Benq LW61-LED PJ. HTC Vive. Panasonic Z-10000 3D Camcorder
Acer H5360 (1280x720@120Hz) - ASUS VG248QE with GSync mod - 3D Vision 1&2 - Driver 372.54
GTX 970 - i5-4670K@4.2GHz - 12GB RAM - Win7x64+evilKB2670838 - 4 Disk X25 RAID
SAGER NP9870-S - GTX 980 - i7-6700K - Win10 Pro 1607
Latest 3Dmigoto Release
Bo3b's School for ShaderHackers