To make the design of game stats for firearms and explosive weapons easier, this page can calculate most of those stats for you, based on the formulas on the weapon design page.


A few things you need to know before beginning to fill out the forms and design weapons. Most importantly, you should enter only numbers into the fields; for decimals, use the English/American system where a . (point) instead of a comma separates the decimals from the whole numbers.

?: Anything that comes out as a question mark cannot be calculated because no formula has been found for it.

NaN or Infinite: Some fields may display the text NaN or Infinite after calculating the weapon's stats. This is the result of invalid data being entered for the weapon's real-world statistics. "NaN" stands for "Not a Number" and means you have probably typed something other than a number into a field. Either can also mean you have left a field blank.


Weapon type Select the type that best describes the weapon you're designing. For carbines, rifle is usually a better choice than sub-machinegun.
Weapon caliber  mm The metric caliber of the weapon (1" = 25.4 mm). This is not the same as the diameter of the bullet before it is fired, but the difference is small enough not make a real difference.
Weapon weight  kg This is the loaded weapon's weight, that is, including the typical load of ammunition.
Weapon length  cm The overall length of the weapon (1" = 2.54 cm). For weapons with a folding stock, enter one of the two lengths (folded or unfolded), hit the Calculate game stats button, note the resulting Length stat below, then type in the other and press the button again.
Sight radius  cm The distance, in centimeters, between the weapon's front and rear sights. For low-power optical sights, enter 55 here, while for telescopic sights, type 66.
Mechanism Select the mechanism that best describes how the weapon works. Automatic means full-automatic; for automatic pistols and similar weapons, you should select self-loading.
Rate of fire rpm This is the cyclic rate of fire, not the practical rate. It is only used for automatic and burst-capable weapons, and can be left blank for other types.
Magazine type Which type of magazine best describes the one the weapon uses.
Ammo capacity rounds How may rounds the weapon's magazine hold. For detachable magazines, enter the capacity of the most common type.
Total ammo weight kilograms For weapons with internal magazines or loose rounds, this is the weight of one individual round. Otherwise, it is the weight of a loaded magazine.
Bullet type 20th century rifle and machine gun bullets are usually pointed, while others tend to be round-nosed. Look at a picture of the bullet to make sure.
Bullet mass g The weight of the bullet (not the complete round!) in grams — not grains (1 gram = 15.4 grains).
Muzzle velocity m/s The speed with which the bullet travels when it leaves the muzzle of the weapon, in meters per second. (1 m/s = 3.28 ft/s).
Ballistic Accuract at 10 hexes This is not a real-world stat, but from the Phoenix Command game system. In a PCCS rulebook, find a weapon of similar type to the one you're designing that uses the same ammunition, and copy its BA value for a range of 10 hexes.

Firearm Game Statistics

Aim Time Ballistic Data
Range in 2 yard hexes
AC Md 10 20 40 70 100 200 300 400
W 2 DC
6 DC
Cap 7
AW 8 3RB
9 MA
KD 10 BA


Weapon weight kg Nothing more than the total mass of the grenade, in kilograms (1 kg = 2.2 lbs.)..
Weapon length cm The length of the grenade in centimeters.
Safety type Choose the type that best reflects the grenade's safety device. The choice is rather limited, admittedly.
Fuse delay s This is the nominal time between the fuse being activated and the grenade exploding, in seconds. When a range of times is quoted in sources, take the average.
Throw/fire range m This is the typical range, in meters, to which the grenade can be thrown.
Number of fragments The number of fragments produced by the grenade on exploding. For blast grenades, leave the field blank,
Weight of explosive charge g The mass of the explosive charge in the grenade, in grams.
Explosive type The type of explosive used in the grenade, which affects how powerful it is. If you don't know the type, choosing TNT is a good default.

Explosive Weapon Game Statistics

Explosion Data
Range From Burst in Hexes
C 0 1 2 3 5 10