AR-15(tan colored one)(aka the "M4" from Modern Warfare II) Template

this is not a M4 Call of duty fans. this is actually a AR-15 with a tan coloring. why do they keep calling the most used assault Rifle in the games the M4 or M4A1? there not. in modern warfare 2019. its actually a MK18. and in world at war its actually a Thompson without the foregrip and drum magazine. -Batim