Military Machine Gun Knowledge

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  • Topic: Machine gun, Ammunition, Weapon
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  • Published : March 11, 2011
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Machine Gun Test
M240B:
Characteristics: Air cooled, belt-fed, gas-operated, fully automatic weapon that fires from the open bolt position. Operational Data:
Ranges
Max Range: 3725m
Max Effective (Point): 800m
Max Effective (Area): 1800m
Grazing Fire: 600m
Tracer Burnout Approximate: 900m
Weight
Receiver: 24.2 lbs.
Barrel: 6.6lbs
Spare Barrel Case With Spare Barrel and All Sl3 Components: 12.90 Lbs.
Tripod with Mounts: 20 lbs.
Dimensions
Length: 49”

Rates of Fire:
Sustained: 100 rounds a minute, 6-8 round bursts, 4-5 second pause between bursts, barrel change every 10 min.
Rapid: 200 rounds a minute, 10 to 12 round bursts, 2-3 second pause between bursts, barrel change every 2 minutes
Cyclic: 650-950 rounds a minute, one continuous burst, and barrel change every minute
Rifling: four grooves with a uniform right hand twist, one turn equals 12 inches. Nomenclature:
Barrel Group
Butt stock and buffer group (hydraulic)
Trigger Housing Group
Operating Group
Receiver Group
Cycle of Operations:
1.Feeding
2.Chambering
3.Locking
4.Firing
5.Unlocking
6.Extracting
7.Ejecting
8.Cocking
Ammunition
1.Tracer
2.Ball
3.Blank
4.Dummy
5.Armor- Piercing
Ammo storage
Keep at least 6in off of ground
Keep away from heat and out of direct sunlight
Keep covered in a double layer of tarp
Do not use clp or other lubricants to clean ammo
Weapons conditions for m240b
Condition 4: Bolt forward, Chamber empty, safety off, no ammo on feed tray, cover closed.
Condition 3: Bolt forward, chamber empty, safety off, ammo on feed tray, cover closed.
Condition 2: N/A
Condition 3: Bolt to the rear, safety on, ammo on feed tray, cover closed Half cocking: Pulling bolt to the rear to engage safety then returning it to the front. This places the weapon in a mechanically unstable safe position. The weapon really isn’t “safe”. Lubricants

LAW
LSA
LSA-T
CLP

M2 Heavy Machine Gun.
Characteristics:Belt Fed, Recoil Operated, Air-Cooled, Crew served Weapon, capable of firing single shot as well as automatic fire, operates on short recoil principle.
Weight
Receiver: 60lbs
Barrel: 24lbs
M3 Tripod and T&E and Pintle: 44lbs
Total: 128lbs
Operational
Max Range: 7400m
Max Effective Range: 1830m
Muzzle Velocity: 3050 fps
Rates of Fire:
Cyclic: 450-550 rpm
Rapid: 40 rounds or more a minute
Sustained: 40 rounds or less a minute
Lengths:
Overall: 65”
Barrel: 45”
Nomenclature:
Barrel Group
Back plate Group
Driving Spring Rod Assembly
Bolt Stud (not a major group)
Bolt Group
Barrel Buffer Group
Barrel Extension Group
Barrel Buffer Assembly
Receiver Group
Cycle of Operations:
1.Feeding
2.Chambering
3.Locking
4.Firing
5.Unlocking
6.Extracting
7.Ejecting
8.Cocking
Types of Ammo
1.Ball
2.Tracer
3.Armor Piercing
4.Incendiary
5.Armor Piercing Incendiary
6.Armor Piercing Incendiary Tracer
7.Blank
8.Dummy
9.High Pressure Test
10.Saboted Light Armor Penetrator
11.Saboted Light Armor Penetrator Tracer
12.Ball Plastic Practice
13.Tracer Plastic Practice
Mk19
Characteristics: Belt fed, blowback operated, air-cooled, crew served, fully automatic weapon.
Weights:
Gun: 75.6lbs
Mk64: 21lbs
Tripod: 44lbs
Total: 140.6lbs
Operational Characteristics:
Fully Auto
Max Effective Range: 1500m
Max Range: 2212m
Muzzle Velocity 790 fps
Open bolt
Rates of Fire
Sustained: 40 rpm 3-5 round bursts, 4-5 sec pause
Rapid: 60 rpm 3-5 round bursts, 2-3 sec pause
Cyclic: 325-375 rpm continuous burst.
Lengths:
Height of gun: 8.8 in
Length of gun: 43.1 in
Width of gun: 13.4 in
Nomenclature:
Receiver Group
Feed Slide Assembly and Tray
Sear Assembly
Top Cover Assembly
Bolt and Back plate Assembly.
Types of Ammo
HE (M383 White Markings)
HEDP (M430 Yellow Markings)
TP (M385 Inert)
TP (Flash bang M918)
Dummy (10 round belts)...
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