USCGC Cushing sails past the Statue of Liberty
MyCG has a retrospective on the USCGC Cushing, a WPB lost with all hands in action against Russia, after being transferred to Ukrainian Navy, apparently in an effort to lure a Russian corvette within range of shore batteries.
USCGC Cushing sails for her final Coast Guard mission before being decommissioned in 2017
This was how she was armed in Ukrainian service.
Soviet era 25mm gun, the 110 PM.
Chuck Hill's CG Blog 
Found a pic I had from 1989 of Cushing stopping in at Galveston, tied up across the pier from my boat. https://twitter.com/Rusted_Skull/status/1506632439808294912