composite-formed units were created, allowing the option of responding with the longer-ranged M107 or the more-accurate M110. In addition, as noted above, the gun barrel on the M107 required frequent changing on early versions of the weapon. Individual batteries did not have the necessary equipment and parts for changing the barrel, so higher-level maintenance support was required, taking two hours in addition to the transportation time. The M107 had an extremely low rate of fire of two rounds per minute. Due to the enormous size of the shells, the ammunition storage inside the vehicle only contained two rounds. Additional ammunition was supplied by the M548 ammunition transporter vehicles. The M107 suffered losses during the Vietnam War, with a considerable number of them destroyed by North Vietnamese troops. The North Vietnamese Army (NVA) also captured several M107s, mainly from ARVN forces. Four M107s were captured during the battle at Quảng Trị in April 1972 and another 12 were taken during the Central Highlands offensive in 1975 towards the end of the Vietnam War. These captured M107s were used by the PAVN during their last offensives against the Republic of Vietnam (South Vietnam) between March and April 1975. With these M107s, the PAVN established a strategic-artillery battalion after the war. During the war against Pol Pot's Khmer Rouge government in neighbouring Cambodia, Vietnamese M107s participated in the many battles along the border of the two countries. Today, Vietnam's M107s are operated as second-line artillery pieces in times of war and are currently in reserve storage of the PAVN's Artillery Corps, together with other American artillery pieces captured from American or South Vietnamese forces during the Vietnam War, such as M101 howitzers (105mm) and M114 howitzers (155mm). Israel The M107 was also used by the Israel Defense Forces in the various Arab–Israeli conflicts from the Yom Kippur War on. During the Yom Kippur War it was one of the few weapons able to destroy Egyptian and Syrian anti-aircraft missile positions. Of the 15 SA-2 batteries lost by Egypt on the east bank of the Suez Canal, 13 were destroyed by M107s. When the IDF crossed the Suez Canal in Operation Gazelle, M107 SP guns were among the first to cross together with tanks and APC's. M107s also had sufficient range to hit the Syrian capital of Damascus. 108 more were received between 1973 and 1982 and they were also fielded during the Operation