Exploring the GAU-21: Specifications and Operational Mechanics

The weight of Gau 21 is 80.00 lb, making it the correct answer.

Ammunition typically weighs 35 lbs. per 100 rounds, providing a standard measurement for the weight of ammunition.

The correct answer is 36.00 in. The length of the barrel of a gun is an important measurement that can affect accuracy and recoil control.

The correct answer is 66.5 in. Overall length refers to the total distance from one end of the object to the other end, which in this case is 66.5 inches.

Short recoil is a type of operation in firearms where the barrel and bolt are locked together for a short distance during recoil, after which they unlock and separate.

Depot maintenance cycle refers to the period in which military equipment undergoes major repairs and overhauls to ensure operational readiness. The correct answer, 40,000 rds., represents the number of rounds fired before maintenance is required in this case.

Air cooling is the most common method of cooling used in data centers due to its cost-effectiveness and simplicity. Water cooling and liquid nitrogen cooling are more specialized methods that are less commonly used. Using fans alone is usually not sufficient to adequately cool a data center.

Muzzle velocity refers to the speed at which a projectile leaves the muzzle of a firearm. It is important for determining the range, accuracy, and impact of the projectile. In this case, the correct muzzle velocity is 2,887 feet per second (fps).

The correct answer is +6,500 m as it signifies the maximum range the weapon can reach. The incorrect answers do not represent the actual maximum range, making them incorrect choices.

The correct answer is 1,850 m, as that is the distance within which the given weapon is most effective. The other options are incorrect ranges that do not represent the maximum effective range of the weapon.

Rate of fire refers to the number of rounds a weapon can fire in one minute. The correct rate of fire provided is between 1,025 and 1,100 rounds per minute (rpm). This measure is crucial in understanding the firepower of a weapon and its effectiveness in combat scenarios.

The correct number of major assemblies is 8. This can be verified by reviewing the components and dividing them into distinct groups.

The correct answer is Barrel and Barrel Extension Assembly because this assembly consists of the barrel and the attached barrel extension, which are crucial components of a firearm.

The correct answer is Back Plate and Buffer Assembly, which is a component commonly found in firearms. The other options provided are common components in firearms assembly, but they do not specifically refer to the assembly mentioned in the question.

The correct answer refers to the Auxiliary Return Spring Assembly, which is a specific component within a larger system. The incorrect answers provided are not related to the given question and do not correspond to the actual assembly being asked about.

The correct answer is the Breech Bolt and Rod Assembly, which is a crucial component in firearms responsible for the loading and unloading of cartridges.

The correct answer is the Recoil Buffer Assembly, which is a component in firearms that helps reduce the felt recoil experienced by the shooter.

The correct answer is 'Feed Cover Assembly' which is a specific part in the assembly process.

The correct answer is Trigger Assembly as it refers to a specific component within a mechanism or machine. Engine Assembly, Transmission Assembly, and Electrical Assembly are common assemblies in vehicles but do not match the context of the question.