Does the Su-25 Frogfoot have cannons or chainguns on it?

Question

Does the Su-25 Frogfoot have cannons or chainguns on it?

Answer 1

Frogfoot is equipped with forward firing 30 mm twin, much like the oversized GSh 23 from the Mig 21.

plus it may carry underwing pods, with the 23mm twin GSh 23.

the weapon muzzle is well visible below and in front of the cockpit from the left side .. the weapon is mounted asymetrically

like Firefox wrote the weapon is either designated  GSh 30-2 or AO 17, both designations valid and correct.

Answer 2

It has a cannon.

The twin barrel GSh-30-2 30mm Autocannon. The weapon is mounted on the port chin.

Answer 3

I not sure about chainguns but of course connons.