Infantry Weapons Fundamentals Flashcards
6 cards from real FMF practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 6 Infantry Weapons Fundamentals flashcards as text
Which of the following BEST describes the primary role of the M27 Infantry Automatic Rifle (IAR) within a Marine Corps fire team?
Answer: To provide accurate, suppressive fire while maintaining maneuverability with the fire team.
The M27 IAR was adopted to provide accurate suppressive fire, an approach thought to be more effective than the high volume of less-accurate fire from the M249 SAW. Its lighter weight and similarities to the M4 carbine allow the automatic rifleman to keep pace with the rest of the fire team.
A Marine is firing an M240B machine gun. The gun fires a long burst and then stops. The barrel is glowing red and emitting heat waves. What is the MOST critical immediate action the Marine should take?
Answer: Wait approximately 15 minutes, keep the weapon pointed downrange, and then conduct a barrel change.
A barrel that is glowing red indicates it is extremely hot (a 'hot barrel'). A hot barrel can cause a round to 'cook off,' meaning it fires without the trigger being pulled. The proper procedure is to wait for it to cool for a safe period, keeping it oriented in a safe direction, before attempting to change the barrel or clear the weapon.
What are the four universal firearm safety rules that are fundamental to all Marine Corps weapons handling?
Answer: 1. Treat every weapon as if it were loaded. 2. Never point a weapon at anything you do not intend to shoot. 3. Keep your finger straight and off the trigger until you are ready to fire. 4. Keep the weapon on safe until you are ready to fire.
The four universal firearm safety rules are: 1. Treat every weapon as if it were loaded. 2. Never point a weapon at anything you do not intend to shoot. 3. Keep your finger straight and off the trigger until you are ready to fire. 4. Keep the weapon on safe until you are ready to fire. These rules are foundational to all weapons training and handling in the Marine Corps.
During a live-fire range, a Marine's M4 Carbine fails to fire. The bolt is forward, and the ejection port cover is closed. According to the immediate action drill, what is the first step the Marine should take?
Answer: Slap upwards on the bottom of the magazine.
The immediate action drill for a stoppage with the bolt forward is often remembered by the acronym 'TAP, RACK, BANG'. The first step, 'TAP,' involves slapping upward on the magazine to ensure it is properly seated, as a poorly seated magazine is a common cause of failure to feed.
Which characteristic correctly describes the M240B medium machine gun?
Answer: Gas-operated, air-cooled, and belt-fed.
The M240B is a belt-fed, air-cooled, gas-operated, fully automatic machine gun that fires from the open-bolt position. It is chambered in 7.62x51mm NATO.
A fire team is maneuvering through an urban environment. The fire team leader needs to provide suppressive fire on a second-story window 200 meters away to cover the team's movement across a street. Which weapon system is best suited for this task with the highest degree of precision?
Answer: M27 IAR with Squad Day Optic (SDO)
The M27 IAR, equipped with the Squad Day Optic (SDO), is designed for precision fire and is more accurate than the M240B at the squad level for point suppression. The SDO provides magnification (3.5x), allowing for better target identification and engagement at 200 meters compared to iron sights or the area suppression focus of the M240B.