Knight's Armament Company PDW
|Knights Armament Company PDW|
|Type||Personal defense weapon, rifle|
|Place of origin||United States|
|Designer||Knight's Armament Company|
|Manufacturer||Knight's Armament Company|
|Weight||4.5 lb (2.0 kg)|
|Length||28 in (710 mm) overall
19.5 in (500 mm) with stock folded
|Barrel length||254 mm (10.0 in)
203 mm (8.0 in) barrel available
|Action||Gas-operated, rotating bolt|
|Muzzle velocity||2,425 ft/s (739 m/s) with 10-inch (250 mm) barrel|
|Effective firing range||250-300 m|
|Feed system||30-round detachable box magazine|
As with all personal defense weapons, the KAC PDW is intended to be compact and lightweight (similar to submachine guns), but have a longer useful range (out to the low end of combat rifle ranges, 250–300 m).
The KAC PDW combines new and off the shelf components in its design. The lower receiver, holding the magazine and trigger assembly, is essentially a shortened M16 rifle lower receiver,which makes the basic operating controls familiar to many potential users.
The cartridge, upper receiver, and operating mechanism are all new designs by KAC.
The KAC PDW uses a completely side-folding stock, unlike the M16 and M4 designs which have their main operating spring in a tube in the stock, and therefore can only partially telescope, and not fold sideways at all.
The KAC PDW is over 10 inches shorter (19.5" vs. 29.8" with stocks folded) and more than 1 pound lighter (4.5 lb vs. 6.3 lb) than the currently serviced M4 carbine, a U.S. Army and Marine weapon, and the barrel has been lightened with a new dimpling process.
The KAC PDW has two gas pistons tapping hot gas from the barrel to operate its mechanism, located on the top left and right sides of the bolt carrier. The single mainspring is located on top, between the two gas pistons.
The KAC PDW fires a 6×35 mm cartridge, a full centimeter shorter than the western military standard 5.56×45mm NATO round. The 6mm bullet is slightly wider, and the standard 6×35mm bullet slightly heavier, than the standard 5.56mm bullet (65 grains (4.2 g) versus 62 grains (4.0 g)).
Fired from a 10-inch (250 mm) barrel, KAC claims that the 6×35mm cartridge reaches a muzzle velocity of 2,450 ft/s (750 m/s), slightly faster than the muzzle velocity of a 5.56 mm cartridge fired from a similarly short barrel. The larger diameter, shorter 6 mm cartridge is optimized for these shorter barrel lengths, and would perform less efficiently from rifle-length barrels. The round's muzzle energy is 831 ft·lbf (1,127 J) versus 792 ft·lbf (1,074 J) for a 5.56 mm bullet, again from the same 10" standard barrel.
There is a discrepancy between the velocity claimed by Knight's for 5.56 mm 62-grain (4.0 g) SS109 NATO ammunition fired from a 10-inch (250 mm) Colt Commando barrel (2,400 ft/s (730 m/s), 792 ft·lbf (1,074 J) energy) and other M-16 manufacturers' stated muzzle velocities (2,627 ft/s (801 m/s), 950 ft·lbf (1,290 J)). In any case the energies and velocities are roughly comparable.