From the Ukraine Weapons tracker Twitter account:
"An interesting Russian MT-LB variant was captured by the Ukrainian army in the vicinity of Vuhledar, #Donetsk Oblast - the APC was upgunned with a 2M-7 naval turret with 2 KPV 14.5mm heavy machine guns, originally intended to be installed on patrol boats and trawlers."
https://twitter.com/UAWeapons/status...HQls0Ub9SBiG2A
That's a good amount of firepower for an APC, but the addition of the naval turret nearly doubles the height/profile of the MTLB.
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