[MasterGunner01]

Admiral Gorshkov frigate armament specifications:

Armament:
1 × 130mm Amethyst/Arsenal A-192M naval gun with rate of fire of 45 rds per minute
2 × 8 VLS cells fitted with Oniks (SS-N-26) and/or Kalibr missile system (SS-N-27)
32 (4 × 8) VLS cells housing 9M96,9M96M,9M96D/9M96DM(M2) family of missiles and or quad packed 9M100 short range missiles
2 × Palash CIWS
2 x 4 324mm torpedo tubes for anti-turpedo/anti-submarine torpedoes
2 × 14.5mm MPTU mounted KPV machine guns
Aircraft carried:
1 × Kamov Ka-27 series helicopter

[Oztrich Boy]

but apart from the 130mm (and possibly the 14.5mm) they are already there, or will be behind hatches/doors when fitted.

[txnativegop]

the Palash CIWS — do you know what caliber it is?