m249 saw squad automatic weapon 5.56mm tm9-1005-201-10 tm9-1005-201-23&p fm 23-14
TRANSCRIPT
M249 Saw
Squad Automatic Weapon 5.56mm
TM9-1005-201-10
TM9-1005-201-23&P
FM 23-14
M249 SAW, 5.56 mm
Purpose of Equipment: M249 machine gun is designed as a fireteam automatic weapon, to make contact with and destroy enemy.
The M249 machine gun can be used as a Squad Automatic Weapon (SAW) or, as a Light Machine Gun (LMG).
It can be fired from the shoulder, or hand-held position, bipod steadied position, tripod mounted position, or from pedestal ringmount position.
M249 SAW, 5.56 mm
The M249 SAW is: Belt-fed, Gas operated, Air-cooled, and Fires from the open bolt position.
Rifling is: Right hand twist, 1 turn in 7 inches.
Sights: Front………….Semi-fixed hooded post type. Rear……Fully adjustable peep type for elevation & windage
M249 SAW, 5.56 mmRange Maximum…………...3600 meters Maximum effective…1000 meters
Rate of Fire: (new style barrel) Cyclic……………...……850 rd./min. Sustain (3-5 round burst)…50 rd./min Rapid (8-10 round burst…100 rd./min..
Note: Rate of Fire for old style barrel was controlled by gas regulator setting.
M249 SAW, 5.56 mmComponents
Heatshield Assy
Buttstock & Buffer Assy
Cocking Handle Assy
Receiver Assy
Trigger Assy100 or 200 rds Magazinecontainer
M249 SAW, 5.56 mmComponents
Barrel Assy
Front Sight
Cover & Feed Mech. Assy
Rear Sight Assy
Bipod Assy
Hand Guard AssyFeed Tray Assy
Sling Assy (not shown) is also a component to the weapon.
Gas cylinder Assembly:-locks bipod in place & provides passage-way for operating gases.
Cover and feed Mechanism assembly.
Old style
New style
Hand guard assembly
-Provides support for sightand feeds linked belt ammoand holds cartridges in position for stripping.
Bolt assembly:-provides feeding, stripping, chambering, firing, & extraction, using projectile gases for power.
Slide assembly
-houses firing pin & roller assembly
Piston assy:
-holds bolt & slide assy & houses the return spring.
-power from propelling gases to bolt & slide assy moves recoiling parts rearward.
Drive spring:
-provides power to piston assy for moving slide & bolt assy forward.
Return rod & transfer Mech assy (new style)
-absorbs recoil for bolt, slide & piston
-transfer recoil pressure to buffer in buttstock-non-repairable
Operating rod assembly (0ld style):
-assembly is repairable & may be disassembled at organizational maintenance.
Bolt Assembly
Bolt
Pin Guide
Spring
Extractor
Extractor PinNote: Mandatory replacement of all 4 parts,if extractor is taken apart for any reason.
All Bolt Assembly should be replaced with the new style that has the face ofthe bolt modified with a cut-out that aids in extracting the cartridge case.
Cartridge Ejector
EjectorSpring
Left side of Receiver
Note: Tip of ejector must be well defined to ensure proper ejection.Cleaning rods can easily damage ejector tip when they are used toassure weapons are cleared on ranges.
Trigger mechanism assy.-houses the trigger,sear, safety & controls the firing of the machine gun.
Red ring visible Ready to fire
Red ring not visible on safe.
Safety:
Old Style Barrel
New Style Barrel
Carrying Handle -fixed(non-folding)
Gas Regular -is a two-position control to change the cyclic . Rate setting.
Flash Suppressor - minimizes muzzle flash
Compensator - minimizes flash, reduces & lessens muzzle climb.
Gas Regulator - has no effect on cyclic rate.
Carrying Handle - is adjustable.
Buttstock and Buffer Assembly
New style Buttstock
Stock Gun, Shoulder: M5
- Solid molder design containing a hydraulic buffer.
- Collapsible buttstock with buffer, which can change the overall length of the machine gun.
Old style Buttstock - Light weight tubular design with plastic web. Contains no hydraulic buffer.