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The 4.6×30mm (designated as the 4,6 × 30 by the C.I.P.) [6] cartridge is a small-caliber, high-velocity, smokeless powder, rebated, bottleneck, centerfire cartridge designed for personal defense weapons (PDW) developed by German armament manufacturer Heckler & Koch (HK) in 1999.
In 1935, Pontiac re-introduced their six-cylinder engine, as a 208 cu in (3.4 L) straight-6. The 208 was produced in 1935 and 1936. It was a side-valve design with a timing chain, as was popular at the time.
The cases of these experimental 5 mm rounds were reformed 5.56 mm NATO cases, although the shape of the bullet was a scaled-down version of an earlier experimental round, measuring 6.23×43 mm. [4] A round measuring 5×44 mm at the neck, made in 1970, was effectively the prototype of the round eventually adopted, although under the name 4.85× ...