Howitzer, 155mm U. S.-built, towed, medium artillery piece M1 mounted on a two-wheel, split-trail carriage with detachable spades. The howitzer is fired from a three-point suspension, with the trails spread and the carriage resting upon an integral firing jack, the wheels being clear of the ground. The piece weighs 12,700 pounds, is 24 feet long, has a muzzle velocity of 560 meters per second and a maximum range of 15,080 meters. Maximum rate of fire is 3 rounds per minute. Howitzer, 8-inch U. S.-built, self-propelled heavy artillery M-110 piece; 37 feet long tracked carriage is identical to that of 175mm gun. M-110 has a maximum range of 16,930 meters and a rate of fire of 1/2 round per minute. HQMC Headquarters, United States Marine Corps IFR Instrument Flight Rules KBA Killed By Air KIA Killed In Action KSCB Khe Sanh Combat Base LAPES Low Altitude Proximity Extraction System LSA Logistics Support Area LZ Landing Zone MACV Military Assistance Command, Vietnam MAG Marine Aircraft Group Machine Gun, U. S.-built, belt-fed, recoil-operated, .50 Caliber air-cooled automatic weapon, which weighs approximately 80 pounds without mount or ammunition; it has a sustained rate of fire of 100 rounds per minute and an effective range of 1,450 meters. Machine Gun, M-60 U. S.-built, belt-fed, gas-operated, air-cooled, 7.62mm automatic weapon, which weighs approximately 23 pounds without mount or ammunition; it has a sustained rate of fire of 100 rounds per minute and an effective range of 1,100 meters. ____ Marines Designation of Marine regiment MATCU Marine Air Traffic Control Unit Medevac Medical evacuation