Since the Fullback entered Low Rate Initial Production some further details have emerged on the configuration of the production aircraft. Polish analyst Piotr Butowski publishing in the German FlugRevue journal, detailed the following configuration for the Sch-141 Kishchnik avionic suite:
Leninetz V004 PESA multimode radar system with nose and tail mounted apertures. The forward aperture provides attack radar mapping, low level penetration modes and conventional fighter multimode air-air functions. The tail aperture in the boom provides a threat warning function.
Ramenskoye RPKB K-102 navigation and attack system, which integrates the cockpit multifunction displays, navigation systems and KSS-1 communications suite.
KNIRTI Khibiny M Electronic Warfare Self Protection suite including the L175V jammer, an infrared MAWS system of undisclosed type, a threat warning and RF surveillance receiver of an unspecified type, and countermeasures dispensers.
Yekaterinburg UOMZ Platan electro-optical targeting system comprising a laser designator and television system.
Weapon payloads comprise a mix of up to eight tonnes of stores. Defensive weapons include the R-27 Alamo, R-73 Archer and R-77 Adder series, with the PESA providing the capability to track ten targets and concurrently engage four with BVR missile shots. The full gamut of Russian air-ground munitions are to be supported, with marketing material including carriage of a pair of Kh-41 Moskit / Sunburn or three Kh-61 Yakhont / Stallion supersonic cruise missiles.
Long term planning is to see higher thrust engines, evolution of the mission avionics, an AESA radar and future munitions integrated.
The cockpit shows the most prominent changes against the developmental design, and now includes a full 'glass' configuration with an array of multifunction displays for the pilot and WSO.
Il a toute une panoplie Air/Air a sa disposition, une simple recherche chez Sukhoi suffit a le savoir. 
, le cockpit a subi quelques retouches, œuvre d'artiste on jurerait.