DRDO’s Carbine Completes Indian Army Trials Our Bureau 1991 DRDO's 5.56x30 mm Protective Carbine undergoing Army trials. India’s state-run Defence Research and Development Organisation (DRDO) has announced that the 5.56x30 mm Protective Carbine successfully cleared Army trials on December 7. This has paved the way for the Joint Venture Protective Carbine (JVPC)’s induction into the services. This was the last leg of trials in a series of user trials which have been carried out in extreme temperature conditions in summer and high altitudes in winter. JVPC has successfully met the performance criteria of reliability and accuracy in addition to quality trials conducted by Directorate General of Quality Assurance (DGQA), DRDO said in a release.