Swedish fast patrol boat Jagaren
57 mm/70 Mark 1 with 2-inch (5.1 cm) flare
rockets on sides
Picture copyrighted by Bofors
Defence
Bofors 57 mm/70 Mark 2
Picture copyrighted by Bofors
Defence
57 mm/70 Bofors Mark 3
USN 57 mm/70 Mark 110
Note the small radar on top of the barrel
Image copyrighted by BAE
Systems
57 mm Mark 3 showing standard and low radar
cross-section (LRCS) mountings
This LRCS mounting was not adopted, see
below for LRCS for DD(X)
Sketch copyrighted by United
Defense
57 mm/70 Bofors Mark 3 (EX 110) with all
access hatches opened
Taken at Naval Surface Warfare Center
Dahlgren (NSWCD) in November 2003
Note the 76
mm/62 Mark 75 at the right
USCG Photograph
57 mm EX (for Experimental) Mark 110 mounting with gun barrel in the reload position
During reloading, the gun barrel is raised to its maximum elevation, which lowers the ready use magazines. The ammunition cassettes are then traversed over the tops of the ready-use magazines and empty their rounds into them.
In this photograph, the right-hand ammunition cassette is the curved box inside of the housing. The tops of the ready-use magazines can be seen to the left of this cassette. Note the triangular shape of the openings in the ready-use magazines, which guide the noses of the projectiles as they drop into the ready-use magazines.
Taken at Naval Surface Warfare Center Dahlgren
(NSWCD) in November 2003
USCG Photograph
57 mm/70 Mark 110 on Test Stand in Louisville,
KY
USCG Photograph
57 mm/70 Gun being test fired at Potomac
River Test Range
USCG Photograph
57 mm being installed onto USCG Bertholf
(WMSL 750) at Northrop Grumman Ship Systems in Pascagoula, Mississippi
Image copyrighted by BAE
Systems
57 mm gun on USCG Bertholf (WMSL 750) being
fired on 11 February 2008 during Builder's Trials
This was the first time that the 57 mm
gun was fired off a USA ship, with a total of 30 rounds being expended
ICGS Photograph
USS Freedom LCS-1 preparing for trials
on 28 July 2008
Lockheed-Martin Photograph released as
US Navy Photograph No. 080728-O-XXXXX-008
57 mm Mark 3 on HMCS Ville de Quebec
In the background is HMCS Haida
Photograph copyrighted by Mike Clark and
used here by his kind permission
57 mm/70 Bofors Mark 3 (EX 110)
Cutaway view showing general arrangements,
ammunition hoists and cassettes
USCG Photograph
Test round being loaded into the breech
on USCG Bertholf (WMSL 750)
Note the roomy gunhouse of this mounting
and the twin ready use magazines directly above the breech
USCG Photograph titled "57mm"
Comparison of Bofors 57 mm (left) and 40
mm guns
Picture copyrighted by Bofors
Defence
57 mm LRCS Mounting for DD(X)
Image copyrighted by BAE
Systems
Artist’s concept of the DD(X) destroyer
design by the Northrop Grumman Corporation Team
The two mountings on the bow are 155
mm AGS while the two on the hanger roof are 57 mm Mark 110
U.S. Navy Graphic 030606-N-0000X-002
Off-site Video
Video #1 and Video #2 of 57 mm gun in action at the USCG Website
Page History
29 July 2008 - Benchmark
04 December 2008 - Added USCG picture
of test round being loaded, added new Off-site Video links
30 April 2013 - Added picture of HMCS
Ville de Quebec