The PLA also fielded a powerful artillery corps equipped with obsolete Soviet ZiS-2 57mm anti-tank guns, M1944 (BS-3) 100mm anti-tank and field guns, M101A1 105mm towed field howitzers, 122 mm howitzer 2A18 (D-30), 130 mm towed field gun M1954 (M-46), Type 59-1 130mm field guns and M1955 (D-20) 152mm towed gun-howitzers, whilst the rocket corps fielded truck-mounted BM-11 122mm and BM-21 Grad 122mm and towed BM-12 (Chinese Type 63 107mm) MBRLs. A small number of &lt;a href="Anti-tank%20gun"&gt;DEFA D921/GT-2 90mm anti-tank gun&lt;/a&gt;s mounted on &lt;a href="M3%20Half-track"&gt;M3/M9 Zahlam half-track&lt;/a&gt;s were captured from the Lebanese Forces in 1983-84. Yugoslav Zastava M55 A2 20mm, Soviet ZPU (ZPU-1, ZPU-2, ZPU-4) 14.5mm and ZU-23-2 23mm Anti-aircraft autocannons (mostly mounted on technicals and BTR-152 and M113 APCs), and towed AZP S-60 57mm anti-aircraft guns were employed in both air defense and direct fire supporting roles. In addition to AA guns and autocannons, the PLA received from Syria a number of man-portable, shoulder-launched Soviet SA-7 Grail surface-to-air (SAM) missiles which were used to bring down two Lebanese Air Force Hawker Hunter fighter jets and one Israeli Air Force (IAF) Kfir fighter-bomber jet during the 1983–84 Mountain War (the pilot was rescued by the Lebanese Army).