The Ship Model Forum

go thru this link viewtopic.php?f=59&t=165105 & look for my Idaho & California to give you somewhat an idea on how to do the blister.

USS LEXINGTON (CV-2) in April 1934. I don't know what type of mount this is, but if I have to guess, it is an experimental multiple MG mount?

The "twin-mounted, single-pedestal" .50-caliber weapons were not installed until both the Lex and Sara reached the West Coast, with Lex receiving hers during the ship's first visit to Naval Yard Puget Sound in late 1928. The Sara didn't have the weapons installed until the ship's second visit to Puget Sound in late '29, but neither carrier received a six-barrel A/A mount that been reportly installed. The Navy also were reportly to install some of these twin-barreled weaponry on some of it cruisers during the early '30s, but have only personally researched the Lexingtons' usage of the A/A batteries.

Cap'n Price,
The Saratoga had only the two single pedestal-mounted water-cooled .50s on the new box platform on the No. 2 turret, that replaced the twin .50s single pedestal mount during the ship's late 1933 visit to Puget Sound. The No. 3 turret carried the twin .50s single pedestal mount upon top until late '35, but afterwards, no .50s were installed, like the forward turret's, until prior to the war. Also, by late '36, the Saratoga was wearing her first 'E' award on the funnel stack, that was awarded to the carrier during July '36.
If you're able to, catch a glimpse of the movie 'DIVE BOMBER', during the flick they have a shot taken from the number 2 turret looking down upon the flight deck, and a quick shot of the single water-cooled .50s on the gun mount (and also the ones mounted on the No. 1 turret that were installed later).
The single mounted pedestal looked similar to the ones on the Ranger's photo that Aggie posted, but the machine gun's barrels lacked the flash deflectors on the Saratoga's weapons.

Hope this helps, and Good Luck on the 'Ship of Happy Langings'!
Fellow Chattanoogain,
Michael,VA