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In fact, it was a process created specifically to extend the life of gun barrels by reducing the effects of wear. Cold-hammer forged machine gun barrels were mass-produced during World War II for the air-cooled MG 42 general-purpose machine gun which very high 1,200 to 1,500 rounds-per-minute cyclic fire rate imparted significant heat stress ...
Polygonal rifling was an outgrowth of a cold-hammer forging process developed by German engineers before World War II. The process addressed the need to produce more durable machine gun barrels in less time than those produced with traditional methods. [46] [47] Later produced barrel bores featured hard-chrome plating to make them more durable ...
Their first cold hammer forging machine “Aklett” was purchased in 1960. Rolf Heym took over management of the company in 1963 until his death in 1972. At that time Elisabeth Heym assumed management of the company and began acquisition of new foreign markets.
The frame, cylinder and barrel of the MR 73 are made from ordnance-certified steel. This high yield strength steel is hard to machine, but ensures the mechanical strength for reliable intensive use, combined with the considerable bolt thrust exerted by C.I.P. conform .357 Magnum ammunition, like the 158 gr (10.2 g) Norma ammunition used by GIGN ...
The C8FTHB (Flat Top Heavy Barrel) features numerous improvements over the C8, including a heavy profile cold hammer-forged M4 profile barrel featuring a grenade launcher cut out for mounting of the Canadian Forces M203A1 and bayonet and Elcan C79 Optical Sight. Some of the earlier C8FTHB carbines used old refurbished C8 receivers.
The quick-change barrel used in the AUG is cold hammer-forged for increased precision and durability, its bore, chamber and certain components of the gas system are chrome-plated (currently nitride on US market rifles). The standard rifle-length barrel features 6 right-hand grooves and a rifling twist rate of 228 mm (1:9 in).
The heart of the SV-98 is a cold-hammer forged receiver and a cold-hammer forged free-floating heavy barrel which can be chrome lined to order. [9] The manually operated bolt action has a rotating bolt with three symmetrically-spaced frontal lugs.
Polygonal rifled barrels are used competitively in pistol action shooting, such as IDPA and IPSC competitions. Part of the difference may be that most polygonal rifling is produced by hammer forging the barrel around a mandrel containing a reverse impression of the rifling. Hammer forging machines are tremendously expensive, far out of the ...