NavyRecognition has an update on the Malaysian Gowind project. This light frigate is probably similar to what VT Halter might have come up with for the OPC, less the missiles and ASW equipment of course, but I would particularly like to take notice of the way the Bofors 57mm Mk3 mount which is otherwise essentially identical to our Mk110 mounts, is treated. It is similar to the installation in the photo above.
When the CG first fielded the 270s, we had problems with green water coming over the bow and impacting the gun. The Malaysian frigate has a fixed structure, with doors on top, where the gun barrel is recessed forward of the rotating gun shield that is intended to make the mount more stealthy, but it looks like it would also protect the mount from heavy seas as well. That might be reason enough for the CG to do something similar.
Malaysia buys the Naval Strike Missile to arm these ships. Photo of a model shows the gun as discussed above. http://www.navyrecognition.com/index.php/news/defence-news/2018/april-2018-navy-naval-defense-news/6144-dsa-2018-kongsberg-signs-contract-with-royal-malaysian-navy-for-nsm-delivery.html