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The Royal Ordnance L7, officially designated Gun, 105 mm, Tank, L7, is the basic model of the United Kingdom's most successful tank gun. It is a 105 mm L/52 rifled design by the Royal Ordnance Factories , intended for use in armoured fighting vehicles , replacing the older QF 20-pounder (84 mm) gun mounted on the British Centurion tank. [ 1 ]
The 105×617mm (4.1 inch), also known as 105×617mmR, is a common, NATO-standard, tank gun cartridge used in 105 mm guns such as those derived from the Royal Ordnance L7. The 105×617mmR cartridge was originally developed from the 84 mm (3.3 in) calibre Ordnance QF 20-pounder 84 × 618R cartridge as part of the development of the L7 105 mm ...
L7 L7A1 9mm Ball Round [250] L7A1 5.56mm Ball Round [234] L7A1 120mm Blank Charge [57] L8 L8A1 5.56mm Blank Cartridge [234] L8A1 40mm Practice Round [2] L8A1-A6 12 Bore Entry Round [251] [252] [253] L9 L9A1.22 inch Ball Round [249] L9A1-A7 12 Bore Short Range Irritant Round [252] L10 L10A1.303 inch Blank Cartridge [9]
Since the early 21st century, most NATO armies have settled on 155 mm (6.1 in) weapons as having a good compromise between range and destructive power whilst having a single calibre, which simplifies logistics; however some military forces have retained 105 mm (4.1 in) towed howitzers for their lighter weight and greater portability, including their rapid airlift and airdrop capabilities.
The M68 differs from the L7 in several aspects : The M68 uses a concentric recoil spring instead of a separate buffer and recuperator hydraulic cylinders. The M68 has a cylindrical breech with a vertical sliding breech block instead of a square-shaped breech with a horizontal sliding breech block. [1] Firing is electrical only.
A slotted flash hider similar to that of the contemporary L1 rifle and L7 general purpose machine gun replaced the conical flash hider. The change from a rimmed to rimless cartridge and nearly straight magazine improved feeding considerably, and allowed use of 20-round magazines from the 7.62 mm L1A1 Self-Loading Rifle. Bren gunners using the ...
The L7 sight is a modified version of a German Leitz instrument. ... A separate "charge super" cartridge is used for firing to maximum range.
The Bofors 57 mm Naval Automatic Gun L/70 (Swedish: 57 mm sjöautomatkanon L/70 (57 mm SAK 70)), [1] [2] among other names, is a series of dual-purpose naval guns designed and produced by the Swedish arms manufacturer AB Bofors (since March 2005 part of BAE Systems AB), designed in the late 1960s as a replacement design for the twin barreled Bofors 57 mm Naval Automatic Gun L/60.