Japan Steel Works was charged with development of the turret and gun system. The latter became a 155mm L30 howitzer weapon whose mounting allowed for inherent elevation for indirect fire. The turret provided a full 360-degree traversal allowing the vehicle to engage at all angled without having to turn itself in the direction of the target area. The main gun was fitted with the requisite fume extractor at its midway point and a double-baffled muzzle brake. 28 x 155mm projectiles were carried aboard and the projectiles are loaded separately from the required bag charge. Local defense was through a single 0.50 caliber heavy machine gun at the right side turret hatch with 1,000 x 0.50 caliber rounds carried. The driver, loader and commander all operated under armored hatches while a full crew of six was featured (two gunners, a layer and radioman were also part of the crew).
The Type 75 featured a effective firing range of 21,000 yards utilizing its basic High-Explosive (HE) munitions. Rocket-Assisted Projectiles (RAPs) went as far as 26,000 yards providing the Type 75 with a fairly good reach on the modern battlefield. The gun system, coupled with a well-trained crew, could reach a rate-of-fire of six rounds per minute. Several vehicles firing in concert could therefore supply a lethal barrage at range, ahead of the main fighting force and useful in destroying enemy fornications or dislodging concentrations of enemy troops.
Despite its successor having already been named and appearing in growing numbers, the Type 75 maintains an active presence in the inventory of the JGSDF.
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