Field Rules

Two knights and a soldier holding rifles guard a misty stone gateway

Joule & FPS Calculator

Work out the muzzle energy of 6mm plastic BBs before you play. Enter any two figures and the third fills in — every gun must chrono at or under 1.5 joules.

BB weight (g)

Speed (fps)

Energy (joules)

Common weights:

1.34 J is under the 1.5 J field limit by 0.16 J.

1
Always be safety minded.
2
All guns must fire at or under 1.5 Joules. In 2027 we will be chronoing all guns with .32g BBs.
3
Masks must remain on at all times while on the field.
4
Absolutely no shooting in the staging area or anywhere other than chrono, shooting range, or battlefield.
5
Barrel covers must be used while in the staging area or you may keep the magazines out of your guns. Both options are acceptable as long as your guns are empty. Treat the staging area like a firing range.
6
Do not purposefully shoot out of the boundaries of the course. Over the net, at houses, or at cars nearby.
7
Do not flash your guns or aim them at passing cars.
8
No smoke grenades. No loud noise grenades.
9
No full auto. Unanimous group decision only. Transport vehicle M4s may use full auto.
10
Any BB, friendly or enemy, that hits you counts as a hit.
11
No arguing or physical fighting allowed. If you have a problem with someone, talk with the owner or staff. Just call your hits and have a good time!