A 7.62 mm PKT coaxial machine gun with 2000 rounds and a 30 mm AGS-17 automatic grenade launcher are the secondary armaments of the BTR-90.
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It is armed with a 2A42 30 mm auto cannon, coaxial 7.62 mm PKT machine gun, AT-5 Spandrel ATGM, as well as an AGS-17 30 mm automatic grenade launcher.