Which statement about the M27 parameters is true?

Which statement about the M27 parameters is true?

• A. The cyclic rate of fire is higher than the sustained rate.
• B. The muzzle velocity is 1,800 ft per sec.
• C. The sustained rate is higher than the cyclic rate.
• D. The muzzle velocity is 3,000 ft per sec.

Answer: (A)

Understanding rate of fire helps here. Cyclic rate is the theoretical maximum the weapon can fire in a minute if you kept pulling the trigger with no breaks, while sustained rate accounts for heat buildup and practical cooling so you can shoot longer without the barrel overheating or losing control. Because of heat and control limits, the cyclic rate is higher than the sustained rate. For the M27 parameters, that relationship holds, so the statement about the cyclic rate being higher than the sustained rate is true. As for muzzle velocity, the M27 fires 5.56 mm ammunition with a muzzle velocity around 2,970 feet per second; 1,800 ft/s is far too low for this cartridge, and 3,000 ft/s is a rounded figure but not the exact published value. The question centers on the rate relationship, which is why this option is the best choice.

Understanding rate of fire helps here. Cyclic rate is the theoretical maximum the weapon can fire in a minute if you kept pulling the trigger with no breaks, while sustained rate accounts for heat buildup and practical cooling so you can shoot longer without the barrel overheating or losing control. Because of heat and control limits, the cyclic rate is higher than the sustained rate. For the M27 parameters, that relationship holds, so the statement about the cyclic rate being higher than the sustained rate is true. As for muzzle velocity, the M27 fires 5.56 mm ammunition with a muzzle velocity around 2,970 feet per second; 1,800 ft/s is far too low for this cartridge, and 3,000 ft/s is a rounded figure but not the exact published value. The question centers on the rate relationship, which is why this option is the best choice.