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L-55 from en.m.wikipedia.org
The L/55 is 1.32 metres (4.3 ft) longer, generating increased muzzle velocity for rounds fired through it. As the L/55 retains the same barrel geometry, it can ...

Rheinmetall Rh-120

The Rheinmetall Rh-120 is a 120 mm smoothbore tank gun designed and produced in former West Germany by the Rheinmetall-DeTec AG company, it was developed in response to Soviet advances in armour technology and development of new armoured threats. Wikipedia
Barrel length: 44–55 calibres
Caliber: 120 millimetres (4.72 in)
Effective firing range: 4,000 metres (4,400 yd) with DM63; 8,000 metres (8,700 yd) with LAHAT anti-tank guided missile
In service: 1979–present
Manufacturer: Rheinmetall; Watervliet Arsenal; Japan Steel Works; Hyundai Precision Industry
Muzzle velocity: L/44: 1,530 to 1,650 m/s (5,000 to 5,400 ft/s); L/55: 1,640 to 1,750 m/s (5,400 to 5,700 ft/s)
Place of origin: West Germany

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L-55 from forum.warthunder.com
Aug 5, 2023 · You see, the Rh-120 L/55 was developed specifically to suit the Leopard 2's gun mount. The 120mm armed Abrams tanks featured a gun mount and ...
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L-55 from www.edrmagazine.eu
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