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莱茵金属公司的L55 120mm滑膛炮的应用及DM53 120mmLKE ⅡA尾翼稳定曳光脱壳穿甲弹的研制都是在“豹”2战斗效能提高计划(KWS1)范围内进行的。该炮及弹的应用引伸出豹2A5。新炮身管比原炮身管增长了大约1.3m,但其药室容积未变。早期表演试验表明,由于初速的提高,该炮的射程增加了大约1500m。 DM53 120mm穿甲弹是一种固定式炮弹,弹丸总成与可燃药筒的固定是通过一药筒连接环实现的。
The application of the Rheinmetall L55 120mm smoothbore gun and the development of the DM53 120mmLKE IIA stabilized tail rotor armor piercing armor piercing arm were carried out in the LEO 2 Warfighting Enhancement Program (KWS1). The application of the cannon and shell draws leopard 2A5. The new barrel has an increase of about 1.3 m over the original barrel but its volume has not changed. Early performance tests showed that due to an increase in muzzle velocity, the range of the gun increased by about 1500 m. DM53 120mm armor-piercing projectile is a fixed type projectile. The projectile assembly and the combustible cartridge are fixed by a cartridge connecting ring.