Complex sentence: SR-3 (СР-3) is a Russian compact fully automatic assault rifle chambered for the 9 x 39 mm subsonic round developed by TsNIITochMash (Central Institute for Precision Machine Building) in the early 1990s.
Split into simpler sentences: SR-3 (СР-3) is a Russian compact fully automatic assault rifle chambered for the 9 x 39 mm subsonic round. It was developed by CNIITochMash (Central Institute for Precision Machine Building) in the early 1990s.