List of things that would be cool, not telling you what to add but saying would be cool and might get you a lot of players. Add a thing so you can buy the entity and change what teams it detects. (in game and only for that 1 weaponchecker) And have a entity like a scanner blocker. When you have it blocks all scans from it.
Something really cool, if you step on it and you dont have illegal weapons it makes a check souns or something pleasent and turns blue for 1 or 2 seconds.