3p051c Pretest For EOC Volume 2

The 12 gauge breaching cartridge is specifically designed to gain access through light doors and entryways. It may not be effective against heavy steel reinforced doors or armored vehicles.

The correct answer is 10 1/16 in to 11 1/4 in. This is the range of the free length of the action spring on the M4 carbine that needs to be inspected for a failure or chamber malfunction.

The barrel assembly of the M203 is chambered for low velocity 40 millimeter grenade launcher ammunition. This means that the ammunition used in the M203 travels at a lower velocity compared to high velocity ammunition. Low velocity ammunition is typically used for shorter range engagements, while high velocity ammunition is used for longer range engagements.

The first inspection for a weapon with a weapon that will not feed malfunction on the M2 machine gun is to check if the cover is completely down and latched. This is important because if the cover is not properly closed and secured, it can cause feeding issues and malfunctions in the weapon. Ensuring that the cover is fully down and securely latched helps to maintain the proper functioning of the M2 machine gun.

The tripod head of the M3 machine gun tripod provides a front support for the weapon. It is responsible for holding and stabilizing the gun in place, allowing for accurate aiming and firing. The tripod head is designed to securely hold the weapon and absorb recoil, ensuring that the gun remains steady during operation.

The correct answer is the disassembly button. This button is located on the right side of the receiver, above and ahead of the trigger guard. It is used to disassemble the weapon for cleaning or maintenance purposes.

When inspecting the barrel assembly of the M240B machine gun, it is important to check for any bulges, bends, burrs, obstructions, or pits in the chamber or bore. This is because any of these issues can affect the performance and accuracy of the weapon. Bulges, bends, or pits in the chamber or bore can cause problems with the chambering and extraction of rounds, while burrs or obstructions can interfere with the smooth movement of the bullet. Therefore, ensuring that the chamber or bore is free from any of these issues is crucial for the proper functioning of the M240B machine gun.

The M2 machine gun is a heavy machine gun used by the U.S. military. The question asks which gauge kit is used to test the barrel erosion on the M2 machine gun. The M16A1 is not a gauge kit, but rather a type of rifle. Therefore, it is likely that the question is incomplete or not readable, as it does not provide a correct answer.

During the cycle of operation of the M9 pistol, the feeding stage occurs as the slide moves forward and a round is stripped from the top of the magazine. This stage involves the mechanism that feeds the round into the chamber of the pistol, preparing it for firing. The feeding process ensures that a fresh round is loaded and ready to be fired when the trigger is pulled.

During the feeding cycle operation for the M240B machine gun, the actuating rollers move the feed lever side to side. This movement of the feed lever causes the feed paws to move, which is responsible for picking up and positioning the ammunition belt. Therefore, the correct answer is "Moves the feed paws."

The question is asking how many welded pins should be present when conducting preventive maintenance checks and services on the receiver of the MK 19. The correct answer is three. This means that during the maintenance checks, the person should verify that there are three welded pins present on the receiver.

The correct answer is 11W3-9-4-2. This is because the question asks for the air force technical order (AFTO) that contains the PMCS (Preventive Maintenance Checks and Services) procedures for the M203. The specific AFTO mentioned, 11W3-9-4-2, is the one that contains the required information.

During preventive maintenance checks and service, cracks exceeding 1 inch on the M203 hand guard assembly would render it not fully capable. This means that if cracks on the hand guard assembly are longer than 1 inch, the functionality and effectiveness of the assembly may be compromised. Therefore, it is important to identify and address any cracks exceeding this length to ensure the proper functioning of the M203 hand guard assembly.

If the slot in the bolt of the MK 19 machine gun is deformed, it is crucial to replace the bolt at a percentage of 50%. This means that if the slot is damaged or distorted beyond this threshold, it is necessary to replace the bolt entirely. This ensures the proper functioning and safety of the machine gun, as any deformation beyond 50% could lead to malfunctions or failures during operation.

The correct sequence when performing the firing pin protrusion test on the M203 grenade launcher is to first cock the launcher, then move the barrel forward, followed by removing the self-locking screw, and finally squeezing the trigger. This sequence ensures that the firing pin protrusion is tested accurately and safely.

Performing a function check to locate the specific problem is the first thing you should do when you have an unknown malfunction on your MK 19 machine gun that won't shoot. This involves following a systematic process to check various components and functions of the gun, such as checking the ammunition, ensuring the safety is off, inspecting the firing mechanism, and verifying that all parts are properly assembled. By conducting a function check, you can identify the specific issue causing the malfunction and take appropriate steps to address it, whether it requires clearing the weapon, changing the barrel, or turning it in for maintenance.

The Mossberg 12 gauge models 500 and 590 shotguns have a cylinder choke. This means that the shotgun barrel has a bore diameter that remains constant throughout its length, resulting in a wide shot pattern. This type of choke is suitable for close-range shooting and is often used for home defense or hunting in dense cover where a wider spread of shot is desired.

The M249 automatic rifle has a fixed headspace. This means that the distance between the face of the bolt and the base of the cartridge case is set and cannot be adjusted. This fixed headspace ensures consistent and reliable functioning of the firearm.

The cocking handle assembly is responsible for moving the moving parts of the M249 automatic rifle rearward. It is designed to slide on the guide rail fixed to the right side of the receiver, allowing it to pull the moving parts back. This action helps to load a new round into the chamber and prepare the rifle for firing.

Insufficient gas pressure can be a primary cause for a failure to feed in the M240B machine gun. The M240B operates using gas pressure to cycle the action and feed the next round into the chamber. If there is not enough gas pressure, the action may not cycle properly, resulting in a failure to feed. This can be caused by various factors such as a clogged gas port, a malfunctioning gas regulator, or issues with the gas system components.

The bolt and operating rod assembly is responsible for providing feeding, stripping, chambering, firing, extraction, and ejection of cartridges using projection propelling gas for power. This assembly is crucial for the functioning of the M240B machine gun as it controls the entire firing process and ensures the smooth operation of the weapon.

The maximum range for the M240B machine gun is 3725 meters. This means that the gun is capable of firing accurately at targets up to a distance of 3725 meters.

The m240b machine gun ammunition feeds from a bandoleer that holds 100 rounds of ammunition.

The given correct answer is "m200 blank". The explanation for this answer is that the m200 blank round of ammunition is characterized by its unique features, such as the seven petal rosette crimp and violet tip. This type of ammunition is specifically designed for training purposes or for creating noise and visual effects without the presence of an actual projectile. It does not contain a bullet and is considered safe for use in certain scenarios where live ammunition is not required.

The correct answer is 5 in. The free length of the M9 recoil spring should not be less than 5 inches. This is because the recoil spring plays a crucial role in absorbing and controlling the recoil of the firearm. If the free length is too short, it may not provide enough resistance to effectively manage the recoil, leading to potential issues with accuracy and reliability. Therefore, it is important to ensure that the free length of the M9 recoil spring is at least 5 inches.

The lower receiver and buttstock assembly houses various components including the trigger assembly, sear, hammer assembly, selector lever, rifle grip, bolt catch, and buttstock assembly. These components are essential for the functioning and control of the firearm. The bolt carrier assembly and charging handle assembly are part of the upper receiver and barrel assembly, which are responsible for the loading and chambering of rounds. Therefore, the correct answer is the lower receiver and buttstock assembly.

The correct answer is 1/3 turn apart. Staggering the bolt rings approximately 1/3 turn apart helps to prevent a short recoil malfunction and ensures proper gap space in the gas rings. This allows for efficient gas seal and reliable cycling of the firearm.

To ensure a seal is created when replacing the bolt carrier key, it is recommended to fire 3 to 8 rounds of blank or ball rounds. This is necessary to allow the key to properly settle and create a tight seal, ensuring optimal functioning of the firearm.

The approximate muzzle velocity for the M4 Carbine is 2970 Feet per second (Fps).

The correct answer is "cartridge, 5.56 mm, ball, M855." The M855 is the standard round used in the M16A2 and M4 series weapons and is also linked and used in the M249. It is a 5.56 mm ball cartridge, which means it is a standard full metal jacket round used for general purpose applications.

The firing pin block is the part of the M9 pistol that sits between the firing pin striker and the firing pin. It is designed to prevent accidental discharges by blocking the firing pin from moving forward unless the trigger is pulled. This safety mechanism ensures that the pistol will only fire when intentional pressure is applied to the trigger, enhancing the overall safety of the firearm.

The probable malfunction for the slide of the M9 pistol not locking fully forward is that the locking block and the lugs are cracked, burred, or broken. This means that there is damage to the mechanism responsible for locking the slide in place, causing it to not fully engage and secure the slide in the forward position.

The K19 machine gun can provide defense units with automatic high explosive fire support up to a distance of 2212 meters.

If pitting is found in the bore area of the M9 pistol, it is necessary to replace the barrel if the pitting exceeds one land in width and 3/8 inch in length. This means that if the pitting is wider than the width of one land (the raised area between the grooves) and longer than 3/8 inch, it is considered excessive and the barrel should be replaced.

The correct answer is "Correct". This means that the headspace of the M2 machine gun is within the acceptable range. The go end of the Headphase gauge should enter freely all the way to the ring, indicating that the headspace is not too tight. Additionally, the no go end should not enter, indicating that the headspace is not too loose. Therefore, if these conditions are met, the headspace is considered correct.

The correct answer is host nation requirements. Personnel may use hollow point ammunition only if it is not prohibited by the host nation's requirements. This means that the use of hollow point ammunition is dependent on the regulations and laws set by the country where the personnel are operating.

The correct answer is receiver because the receiver is the main part of the shotgun that houses the firing mechanism and other important components. It is typically made of metal and is located at the rear of the shotgun. The serial number is usually engraved or stamped on the receiver for identification and tracking purposes.

The correct answer is that the Mossberg model 590 has a detachable heat shield. This means that the heat shield on the model 590 can be easily removed, while the model 500 may not have this feature.

A bird scare cartridge is the correct answer because it is a type of 12 gauge shotgun cartridge that contains a pyrotechnic projectile. This projectile is housed in a corrugated plastic case with a brass plated steel base. Bird scare cartridges are commonly used to scare away birds from agricultural fields or airports without causing harm to them.

The rear sight range plate of the MK19 machine gun is incremented in 100 meter intervals from 300 to 1500 meters. This means that the range plate has markings at every 100 meter increment starting from 300 meters up to 1500 meters. It does not have markings beyond 1500 meters.

The train and elevation assembly provides travel lock and mechanical fire control adjustment capability in one unit. This means that it can lock the gun in place during travel and also allows for adjustments to be made to control the firing of the gun.

The M122A1 tripod legs may not fully extend and lock due to dirt or rust. To clean and lubricate the parts, a solid firm lubricant should be used. This type of lubricant can effectively remove dirt and rust, ensuring smooth movement and proper locking of the tripod legs.

The correct answer is m232 dummy. The m232 dummy round of ammunition does not contain any propellant or primer. It is used for training purposes or for simulating the weight and dimensions of live ammunition during drills and exercises. The absence of propellant and primer makes it safe to handle and eliminates the risk of accidental firing.

The correct answer is a round of ammunition not fully seated in the barrel. This means that when using the m249, there is a malfunction where a round of ammunition is not properly inserted into the barrel. This can result in the weapon not firing properly or misfiring altogether. It is important to ensure that the ammunition is fully seated in the barrel to prevent this malfunction from occurring.

The cartridge 5.56 mm, tracer, M856 should not be used in the M16A1 except under emergency conditions and only at targets less than 90 meters in the distance. This indicates that the M16A1 is not designed to effectively engage targets beyond 90 meters using the M856 tracer ammunition. Therefore, it is recommended to use this ammunition only in emergency situations and when engaging targets within a shorter range.

The correct answer is 40 seconds. This is because the M583A1 white star parachute round is designed to burn for approximately 40 seconds.

The M397 round is designed to inflict personal casualties using an air-burst effect. This means that when the round is fired from the M203 grenade launcher, it explodes in mid-air, creating a fragmentation pattern that is intended to cause harm to individuals in the vicinity. The "jump up" aspect of the round refers to its ability to explode at a predetermined height above the ground, maximizing its effectiveness in causing casualties. This type of round is commonly used in military operations where the goal is to neutralize enemy personnel.

The arming distance for the M651 tactical chemical smoke round is 10-30 meters. This means that the round needs to travel a distance of 10-30 meters before it arms and begins to release the smoke. This distance ensures that the round is at a safe distance from the user when it activates, minimizing the risk of injury or damage.

In the cycle of operations for the M203 grenade launcher, the steps of extracting and cocking occur at the same time. Extracting refers to the removal of the spent casing from the chamber, while cocking involves preparing the weapon for firing by pulling back the cocking lever. These two actions happen simultaneously to ensure a smooth and efficient operation of the grenade launcher.

The Bore constriction check tool is used to detect dents and minor damage in the M203 that could obstruct the forward progress of a fired projectile. This tool helps ensure that the bore of the M203 is clear and free from any obstructions that could affect the performance of the weapon. It is specifically designed to check for any constrictions or blockages in the bore, allowing for the identification and rectification of any issues before firing the weapon.