AG6 - jettison fuel tanks
AG7 - other pylons

[FICTIONAL]

"Upgraded" D-3.
Never avionics, radar and a "new" airframe, as well as the addition of the second engine made the D-3-2 the ultimate version of the D-3.

As soon as D-3 got adopted by the [...] air force, the upgraded version, the D-3-2 rolled out. It featured countless improvements, not only to the equipment, but the flight performance as well. Two [...] engines were installed instead of one, substantially increasing it's acceleration and T/W ratio, and also making it fly faster, with supersonic level flight finally being available at high altitudes. Wings were swept back more specifically to achieve that. Wings were reinforced and widened a bit and wing fences were installed to further increase the wing performance. The armament capacity haven't changed much.

Almost 5000 aircraft were built from [...] to [...], and less than a thousand were sold to other countries.
D-3-2 served the [...] air force for around twenty years, and it was retired in [...]. It fought in [...] ([...]), shooting down [...] [...] bombers, [...] transport and [...] fighter aircraft, which was the most successful war for the D-3-2, earning the "[...] of [...]'s [...]" nickname among the pilots. It made an appearance in [...], [...], [...], [...] and [...], and many other conflicts around the globe, being operated by other countries.