Well, it is hard to answer your question . . . "(-6x1y)m-4" is not an equation, you see. To be an equation, the formula needs to have an equals sign. Example: 6x+27 -17 = 32 is an equation and can be solved.
However, your stated formula can be better written like this:
m-4 (-6y)
The standard diameter of an M4 bolt is 4 millimeters.
The standard diameter of an M4 screw is 4 millimeters.
The standard size for an M4 thread is 4 millimeters in diameter with a pitch of 0.7 millimeters.
The standard M4 bolt size commonly used in industrial applications is 4 millimeters in diameter.
The standard M4 screw size is commonly used to secure components in electronic devices.
The M4 is the basic weapon system for the modern infantry soldier. It is usually equipped with a M68 red dot sight. A standard combat load for a soldier carrying an M4 is 400 rounds of ammunition. Are you serious? 400 rounds is not the STANDARD combat load. The M16A4 is the standard basic weapon but is being replaced by the M4. A red dot is definitely not the standard sight.
130 miles taking A477 to M4, then M4 across to Bristol.
33 inches/840mm with the buttstock extended and the standard A2 flash suppressor and standard buttstock.
No
M855 62 grain ball.
5.56 nato or civilain 223 remington
The M4 carbine fires NATO standard 5.56x45mm ammunition. This is often confused with commercial .223 Remington ammo, which is dimensionally similar. However, they are not the same.