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The HK 4.6×30mm cartridge is a type of ammunition used in the Heckler & Koch MP7 Personal Defense Weapon (PDW) and by the canceled HK UCP pistol.
This is intended to give the PP-2000 armor-piercing capability comparable to the FN P90 and Heckler & Koch MP7 personal defense weapons while also being able to use common 9mm Parabellum rounds.
Colt was the original producer of the M16 rifle, rights to which it purchased from designer ArmaLite, and today offers a complete “Family of Weapons” based around the derivative M4 Carbine, which includes a heavy barreled rifle (HBAR®), a carbine with sliding stock (M4 & ACC-M), a personal defense weapon with folding-collapsible buttstock (SCW), a piston carbine (APC), a Commando® M4 with a 10.5 in.