The Bofors 57mm 70 caliber gun was first introduced in 1966 when it was fitted on the Swedish Navy’s Spica class fast attack craft. The Mark 1 gun had a 200
rounds per minute rate of fire and a 40-round magazine in the turret. An additional 128 rounds were stored beneath the deck. The Mark 2 was designed in 1981 and
introduced into service three years later on the
Stockholm class corvettes. The Mark 2 had a slightly increased rate of fire of 220 rounds per minute. The Mark 2 was
housed in a new light weight gun turret and had a new gun barrel that was forged from monobloc steel, which eliminated the need to use a water jacket for gun barrel
cooling during firing. In addition, a new servo drive/servomechanism system was developed which increased reaction time and improved gun aiming and control. This
new system made it both accurate and agile enough for use against sea skimming anti-ship missiles.

The Mark 3 was designed in 1995 but introduced into service in 2000 with the
Visby class corvette. The Mark 3 had the same gun turret, rate of fire and ammunition
capacity as the Mark 2, but an additional 1,000 rounds were stowed in a standby rack beneath deck. The most significant improvement was the fitting of a small
radome above the gun barrel which was used for measuring the muzzle velocity of the departing projectiles for fire-control purposes. Also, a new optional low radar
profile stealth mounting was developed, which allowed the gun to be hidden from radar. The United States Navy and Coast Guard have designated the Mark 3 as the
Mark 110 Mod 0 57mm gun and it is manufactured at the BAE Systems facility in Louisville, Kentucky. The Mark 110 Mod 0 57mm gun is fitted on the U.S. Navy’s
Freedom and Independence class Littoral Combat Ships (LCS) and the Coast Guard’s Legend class cutters.
Black Cat Models has expanded its 3D printed accessory catalog to include modern weaponry and its first offering is a Mark 110 Mod 0 57mm gun. The clamshell
package provides one turret housing and four barrels. Each barrel will allow you to model the gun in four different elevations, which is a nice touch. I compared it to
the parts in the Bronco Models
USS Fort Worth kit and in my opinion, the 3D printed version is a vast improvement. The shape of the doors on the sides are correct
on the 3D printed version and a bit more refined. Also, you will not need to assemble the various parts in the plastic model to make turret; just select the barrel you
want, glue it to the turret and attach it to the deck. A single sheet instruction guide is available as a download from the
Black Cat Models website. The sheet does not
make reference to the four different barrels and elevations, which is a small omission but would have been useful.
I would highly recommend this accessory if you are planning to build any of the plastic Freedom and Independence class LCS kits out there. Now, all we need is a kit
of a
Legend class cutter to fit this on. My thanks to Ben Druel at Black Cat Models for the review sample.
Felix Bustelo
New York
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