TYPES OF OPERATIONS
MANUAL M-203 Grenade Launcher 40 mm M-500/590 Mosberg Shotgun
GAS M-16 series cal 5.56mm, M-4 Series 5.56mm, M-240 Series 7.62mm
RECOIL M-9 pistol 9mm, M-2 Machinegun Cal 50
BLOWBACK MK-19 Machine gun 40 mm
CYCLE OF FUNCTIONING
FEEDING Magazine, Belt, Drum, Manual (Getting the rounds into the weapon)
CHAMBERING Getting the round into the barrel chamber and compressing the ejector and extractor
LOCKING Securing the bolt behind the chamber for controlled firing
FIRING Detonation of the primer of the cartridge to ignite the powder in the cartridge
UNLOCKING Opposite of locking
EXTRACTION Opposite of Chambering
EJECTION Opposite of Feeding
COCKING Opposite of Firing
TYPES OF FIRING PINS ( Does not include all guns)
FREE FLOATING M16/4 Series Rifles (Does not incorporate a spring)
SEMI-FIXED M-240 Series Machine guns (Does not incorporate a spring)
INERTIA M-9 9mm Pistol, M-249 5.56mm, (SAW) Machine gun M-500/590 Mosberg Shotgun.
(Incorporates a spring in front of the Firing Pin and normally uses a hammer to
strike the pin. Then the spring repositions the pin to the rear)
PERCUSSION M-2 Machine gun M-203 Grenade launcher MK-19 MG. (Incorporates a spring behind the
Firing Pin and uses a sear to release the firing pin from the cocked or seared position)
GENERAL INFORMATION
PINS, SPRINGS, DETENTS, COTER PINS, Take on the name they operate!
Do not name a spring a helical compression. It must have a name like; firing pin spring or
extractor spring, or ejector spring. Pins same way firing pin, Ejector pin, Extractor pin.
EXTRACTORS They are either Spring Loaded (a spring operates them) or Spring Tensioned (they are
bent to give tension of themselves)
BLOW BACK This operation omits the locking and unlocking steps in the cycle of functioning.
SAFETIES SWITCH SAFETY SLIDES, BUTTON SAFETY PUSHES, LEVER SAFETY TURNS
DA PAM 750-8 TAMMS FORMS EXECUTION MANUAL (Tables B-1 thru Table B-22) list additional
data for annotation in filling out TAMMS Forms.
DA PAM 25-30 (EM 0001) INDEX for publications and blank forms (Used to be on CD Rom Disk). Now it
is accessed thru the internet using an AKO Account.
ETM'S (EM 0065) CD ROM IS TM'S AND MOUNTS FOR SMALL ARMS.
AR 700-138 Material Condition Status Reporting (Tables B-1 and B-2 lists Items with LIN
Codes to report items of equipment as systems that are reportable to DA.
FUNDAMENTALS OF SMALL ARMS PAGE