GAU-21 Flashcards
Max Effective Range
1850m
Max Range
6500m
Muzzle velocity
2887 fps
Rate of fire
950-1100 rpm
Weapon stoppage procedures
1.) Weapon- trained on target (5sec)
2.) Weapon - charge (within the next 5 sec)
If bolt locks to the rear
3.) Weapon - fire (as req)
If weapon fails to fire
4.) Repeat steps 1-3
If weapon still fails to fire
5.) Fire/ safe selector - safe
6.) Weapon - clear
7.) Headspace/ timing - checked
8.) Feed chute - checked
If weapon cannot be locked to the rear
9.) Fire/ safe selector - safe
10.) Land as soon as practical
Runaway gun procedures
1.) weapon - trained on target
2.) Fire/ safe selector - safe
3.) weapon - clear
4.) Feed / chute ammunition - remove
Major components
Feed Cover
Auxiliary return Spring
Receiver
Trigger
Barrel Jacket/ Barrel
Bolt
Barrel Buffer
Backplate
Cardinal rules of aerial gunnery
Locate friendly forces
Engage the target in max effective range
Always assume the area is hot
Disengage the target before enemy’s effective range
Avoid Zap zone
Conserve ammo
Avoid flying in trail
Avoid target overflight
Take your time
Avoid flying parallel to terrain features
Know the situation
Cycle of operations
Feeding
Chambering
Locking
Firing
Unlocking
Extracting
Ejecting
Cocking
Feeding
When the next live cartridge in the ammunition belt is pulled over the belt holding pawls and onto the feed table
Chambering
Occurs with forward movement of the bolt
Locking
Occurs when the bolt locks to the barrel extension
Firing
Occurs when the firing pin makes contact with the primer
Unlocking
Occurs when the bolt is released from the barrel extension
Extracting
Two part process of removing a live cartridge from the ammunition belt, while simultaneously removing a cartridge case for the chamber
Ejecting
Forces the cartridge case out of the weapon
Cocking
Cocking lever of the bolt contacts the bolt latch bracket on the receiver, forcing the firing pin to retreat and lock back in the sear
Calls for cleared to fire
Tail is searching
Tail tally targets… going hot right side
CEASE FIRE CEASE FIRE CEASE FIRE
tail is safe
Calls when reloading
Tail is safe … reloading
Calls when arming
Tail gun is armed, ready to fire
Calls when dearming
Tail gun is safe and clear
100 rounds fired
Call when out of ammo
Tail is Winchester
Weapons free
Fire only at targets not identified as friendly IAW ROE
