The new system is also better at locating and tracking targets, adviser to the deputy head of Russia's Conglomerate Radio-Electronic Technologies (KRET) told RIA Novosti.
"The guidance system conducts preliminary target allocation and the pilot can confirm or adjust it. As soon as the launch is approved, the system automatically uses all types of weapons – missiles, bombs and so forth," Vladimir Mikheev noted.
KRET has developed over 70 percent of the PAK FA's avionics.
The United States Armed Forces operate the only combat-ready fifth-generation fighter in the world, the Lockheed Martin F-22 Raptor. Several other next-generation jets, including the notorious Lockheed Martin F-35 Lightning II, are in various stages of development in the US, Russia and China.
Some experts say PAK FA is superior to the US jets.
"The analysis that I have seen on the PAK FA indicates a pretty sophisticated design that is at least equal to and some have said even superior to US fifth-generation aircraft," the National Interest quoted former US Air Force intelligence chief Lt. Gen. Dave Deptula as saying.
The Sukhoi PAK FA, also known as the T-50, is currently undergoing testing. It is expected to enter mass production next year and to be commissioned in December 2016.
Russia's fifth-generation Sukhoi PAK FA fighter jet (T-50 prototype) at the Aviadarts 2015 competition. pic.twitter.com/V7dpjz8KqH— IraqiSuryani (@IraqiSuryani1) 6 августа 2015
The fighter jet is meant to replace Russia's aging Mikoyan MiG-29s and Sukhoi Su-27s.