Question: Which gas-operated (short-stroke gas piston) self-loading rifle with a rotating bolt is developed by the Tangodown company?
Sentence (from "AL-7"): The AL-7 uses a type of operation developed by Pyotr Tkachyov of TsNIITochMash (Central Institute for Precision Machine Building) in the mid-1960s known as "Balanced Automatics" first used on the AO-38 assault rifle.
Relevant evidence: No