Complex sentence: Next year, a competition between Simonov's design and rifle made by Fedor Tokarev was held, and Simonov rifle emerged as a winner and was accepted to service as AVS-36.
Split into simpler sentences: Next year, a competition between Simonov's design and a rifle made by Fedor Tokarev was held. The Simonov rifle emerged as a winner and was accepted into service as the AVS-36.