The 6th prototype is ready, was shown at Defexpo-2014 today. Winter trials in Sikkim next week and summer trials in Pokharan in May/June. Its an Army-OFB initiative.
Technical specs are as follows:
Length of barrel -- 6975 mm
Weight of finish barrel -- 1890 kg
Weight of ordnance complete -- 3020 kg
Chamber capacity -- 23 litres
Max range -- 38000 meters
Muzzle velocity -- 885 m/s
Type of ammunition used -- HEER, M107, FH77B, ERFB BB, ILLG, SMK, Incremental charge bag.
Muzzle Brake -- Modified double baffle muzzle brake
Gun recording and laying -- INS based auto laying.