No, it is not an American BAR, it is a Soviet-era DP light machine gun. Both the BAR and the DP were used in the infantry support role. Both were far lighter than the Browning M1917 or M1919 series belt-fed machine guns or the M1910 Maxim belt-fed machine gun. Both the BAR and DP fired the standard rifle cartridge of the day; 30-06 Springfield for the Americans and the Russian 7.62x54R Moison-Nagant M1891. Capacities of the BAR and DP magazines were different also; the BAR’s held 20 rounds and the DP’s held 47 rounds. Both guns were gas operated. Early models of BAR (M1918) did not have a bipod, but the M1918A2 BAR used in WW2 and Korea did. The DP had a bipod from the outset. The DT light machine gun was a variant specifically used on tanks and came with a kit to turn it into a ground gun. There was also a variant of the DP used on pre-WW2 Soviet aircraft.
The RPD fires the 7.62x39 round and does not have select fire.