So far, Act-Labs has made a VGA (ie. computer monitor) Lightgun, and now they are probably gonna make a TV Lightgun. I don't know a lot about Arcade Monitors but I know that they are different than both VGA Monitors and TVs. So I don't think that either of these Lightguns will work for you.
But don't loose hope. Act-Labs MAY perhaps oneday produce a Arcade Monitor Lightgun if the demand is enough.
Also, within the past week there has been some talk about the Lighguns and I know someone was talking a little about being able to maybe hack the TV Lightgun to make it work with a Arcade Monitor. It sounded promising so only time will tell and keep your fingers crossed
