Talk:5inch Twin Gun Mount Mk.28 mod.2/@comment-49.146.215.239-20160627180004/@comment-26874340-20160816152937

IIRC, for DDs, only the twin gun variant on Gearing and Allen M Sumner were truely AA capable.

Early variants, like the ones on Porter-class, had to be made extremely light and this removed a lot of its AA capability.

The variants used on Atlanta and as secondaries for other ships were extremely heavy compared to the ones that could be mounted on DDs.

Farragut through Fletcher use a single variant, which, obviously, doesn't have weight issues.