Notes: This is a further improvement of the PK. The standard model is an infantry weapon for use on a bipod or tripod, but there are also variants for use on special antiaircraft tripods or naval mounts. (The standard tripod is a light version of the Pact Light Tripod, weighing 4.5 kilograms.) The MG can be fed by standard PK ammunition belts or by Arsenal-manufactured belts of 100 or 200 rounds. It is capable of firing a wide variety of ammunition types including light and heavy bullets, tracers, AP, and SLAP-type rounds. Externally, the MG is similar in appearance to the PK, but where wood is used in the PK, plastic is used in the MG.

Twilight 2000 Notes: This weapon is so rare as to be virtually non-existent in its 7.62mm Nagant form. In the 7.62mm NATO chambering, it does not exist.

Merc 2000 Notes: As Bulgaria did not enter NATO in the Merc 2000 timeline, the 7.62mm NATO version is built only in very limited amounts for certain export customers.

Notes: This heavy infantry machinegun is the Bulgarian counterpart to the Russian NSV or DShK. It is designed for use on a special tripod which can vary in height from 500-1450 millimeters, depending upon the tactical situation. Special mounts are also available for antiaircraft work or from naval vessels. The standard infantry tripod weighs 10 kilograms. The MG-M1S is fed by 70-round belts of ammunition, though it can also use Russian belts of 50 rounds. The MG-M1S may be set up to feed from the left or right side (but not both at once). The barrel is of the quick-disconnect type. It is built largely of steel, and the steel is high-grade but light in weight.

Twilight 2000 Notes: This weapon does not exist.

*This weapon must be fired from a tripod.

Notes: This Bulgarian variant of the PK differs primarily in using plastic where the standard PK uses wood. Most of the other differences are to suit local manufacturing methods and the stature of the average Bulgarian soldier.