Notes: The APK antimateriel rifles are a pair of weapons in different calibers and designed for equipment destruction, EOD use, and long-range sniping. The APK is a single-shot rifle using a falling-block action, actuated by a lever on the side of the rifle. (This lever can be moved to accommodate left and right-handed shooters.) The rifle uses a semi-bullpup design, with a loading ramp underneath the rifle and a pistol grip/trigger group in front of the loading ramp. The APK has no receiver as such; instead, a round is inserted directly into the chamber where it is gripped by the rifle’s mechanism just enough to allow the shooter to lock the action again. When the operating handle is worked again, the spent case simply falls out of the bottom of the rifle. The top of the rifle has a mount which may take both Eastern and NATO-type telescopic sights and night vision devices. The APK has no iron sights. On the barrel, near where is meets the mechanism, is a collar with a bipod mount. The stock is unusual for modern antimateriel rifles, being made of contoured walnut which is laminated and weatherproofed; the buttplate has a thick rubber recoil pad, and the stock includes a non-adjustable raised cheekpiece/comb. The heavy steel barrel is 36.2 inches long and tipped with large pepperpot-type muzzle brake.

There are actually two versions of the APK: The APK-20, chambered for the 20mm MG-151 cartridge, and the APK-12.7, chambered for .50 Browning Machinegun. Both are essentially identical, except for the lower weight of the APK-12.7 and being 1.2 inches shorter (though the barrel length is the same in both cases).

Twilight 2000 Notes: These rifles do not exist in the Twilight 2000 timeline.

*Penetration value of the SAPHEI round against personnel is 2-2-3.

**Penetration value of the HEI round against personnel is 1-1-2.