mid90s mac shareware game 2 guns on circles

[captainerock]

Looking for a game my buddy gave me in like 94-96 on my old mac which you could play 1p vs comp or play against each other. you and your opponent each controlled a gun which traveled along a circle. the guns were upgradable and you tried to completely destroy the other players gun. the two circles were separate, so you were each on your own circle, but they could be togled into a figure 8 so you ended up following one another. No levels or anything, just good old fashioned fun.