Six principal variants have been developed in Chinese service:
J-6A (J-6IV) Similar to MiG-19PF, all-weather radar-equipped interceptor with two 30mm cannon. Exported as the F-6A.
J-6B Similar to MiG-19PM "Farmer-D", interceptor with two PL-1 (Chinese version of Soviet K-5 (AA-1 'Alkali') beam-riding air-to-air missiles; it is unclear if the J-6B retains its cannon.
J-6C Day fighter version with three 30mm cannon and braking parachute at the base of the rudder J-6 Xin Advanced version of the J-6A with radome on the splitter plate (rather than the shock cone centerbody) for Chinese-made radar.
J-6III Single-seat day-fighter prototype.
JJ-6 Two-seat trainer, stretched 84 cm (33.1 in) to accommodate second seat, armed with one 30 mm cannon. Exported as FT-6.
JZ-6 Dedicated reconnaissance version with fuselage camera pack replacing cannon. As of April 2006, it was reported that the PLAAF 3rd Recon Regiment, 26 Air Division based in Nanjing MR, is the last regiment to actively fly the JZ-6.
F-6RF in PAF:J-6C(?) early type with a large Fuel tank under fuselage and two swinder pylons with AIM-9J/L.
Later J-6: J-6Cs(?) late type with a large Fuel tank under fuselage and two s pylons with PL-2 such as F-6 in PAF
PAF F-6
Almost PLAAF are day fighters