2 M249 SAW, 5.56 mmPurpose 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, bipodsteadied position, tripod mounted position, or from pedestal ringmount position.
3 M249 SAW, 5.56 mmThe M249 SAW is: Belt-fed, Gas operated, Air-cooled, andFires 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
4 M249 SAW, 5.56 mm Range Maximum…………...3600 meters Maximum effective…1000 metersRate of Fire: (new style barrel)Cyclic……………...……850 rd./min.Sustain (3-5 round burst)…50 rd./minRapid (8-10 round burst…100 rd./min..Note: Rate of Fire for old style barrel was controlled bygas regulator setting.
6 M249 SAW, 5.56 mm Components Cover & Feed Mech. Assy Barrel Assy Front SightRear Sight AssyBipod AssyFeed Tray AssyHand Guard AssySling Assy (not shown) is also a component to the weapon.
7 Cover and feed Mechanism assembly. -Provides support for sightand feeds linked belt ammoand holds cartridges inposition for stripping.Gas cylinder Assembly:-locks bipod in place & provides passage-way for operating gases.Old styleHand guard assemblyNew style
8 Slide assemblyBolt assembly:-houses firing pin & roller assembly-provides feeding, stripping, chambering, firing, & extraction, using projectile gases for power.Piston assy:-holds bolt & slide assy & houses the return spring.Drive spring:-provides power to piston assy for moving slide & bolt assy forward.-power from propelling gases to bolt & slide assy moves recoiling parts rearward.
9 Return rod & transfer Mech assy (new style) -absorbs recoil for bolt, slide & pistonOperating rod assembly (0ld style):-transfer recoil pressure to buffer in buttstock-assembly is repairable & may be disassembled at organizational maintenance.-non-repairable
10 Bolt Assembly Bolt Spring Extractor Pin Guide Note: Mandatory replacement of all 4 parts,if extractor is taken apart for any reason.Extractor PinAll 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.
11 Cartridge Ejector Ejector Left side of Receiver Spring 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.
12 Trigger mechanism assy. -houses the trigger,sear, safety & controls the firing of the machine gun.Safety:Red ring visible Ready to fireRed ring not visible on safe.
13 Carrying Handle -fixed(non-folding) Old Style Barrel Flash Suppressor - minimizes muzzle flashGas Regular -is a two-position control to change the cyclic Rate setting.Carrying Handle - isadjustable.Compensator - minimizes flash, reduces & lessens muzzle climb.New Style BarrelGas Regulator - has no effect on cyclic rate.
14 Buttstock and Buffer Assembly New style Buttstock- Solid molder design containing ahydraulic buffer.- Collapsible buttstock with buffer,which can change the overall lengthof the machine gun.Stock Gun, Shoulder: M5Old style Buttstock- Light weight tubular design withplastic web.Contains no hydraulic buffer.