[LibKill]

Where are the guns?

A plane without guns is a gelding, not a stallion.

[dighton]

According to this, it has a 20mm Gatling.

[csvset]

From LM site linked previously.

The F/A-22 has an internal M61A2 20mm cannon, an advanced version of the proven M61 Gatling-type gun.

[Poohbah]

The gun's probably high up on the fuselage to avoid stuffing gun gas down the intakes.