A foam sword, a resin blaster, and a wooden staff all pass through the same convention prop-check table, and each is judged by a different standard. Convention weapon policies can feel arbitrary until you see that they sit on top of actual law, and that the law is strictest about anything resembling a real firearm.
The rules the convention sets
Private conventions write their own weapons policies as a condition of entry, and those policies are usually stricter than the law requires. Common terms include no functional or sharpened blades, no real firearms even if unloaded, peace-bonding or tagging of approved props at a check-in station, and a ban on anything that could be mistaken for a working weapon at a distance. Because the venue and organizer control admission, their policy is the first rule that matters, and staff can refuse or eject a prop for any reason.
The law behind imitation firearms
Prop guns are where public law becomes concrete. Federal law regulates the manufacture and sale of look-alike guns: the U.S. Code requires that a toy, look-alike, or imitation firearm carry an approved marking, most familiarly a blaze orange plug permanently affixed in the barrel, recessed no more than six millimeters from the muzzle. That statute, 15 U.S.C. 5001, lets the Consumer Product Safety Commission approve alternate markings and waive them for theatrical, movie, or television use, and it exempts traditional BB, paintball, and pellet guns and pre-1898 antique replicas.
State law adds another layer, and it varies widely by jurisdiction. California, for example, makes it a misdemeanor to change, alter, remove, or obliterate the coloration or markings required on an imitation firearm in a way that makes it look more like a real firearm. For a cosplayer that is a direct instruction: leaving the orange tip or bright coloring intact is not just a con rule, in some states removing it can be an offense.
The reason both the federal marking rule and these state provisions exist is public safety. A realistic replica is dangerous precisely because a bystander or a police officer cannot tell it from the real thing in the moment, and that ambiguity is what the law tries to remove. Understanding that logic helps make sense of why conventions are far more relaxed about a three-foot foam greatsword than about a palm-sized handgun replica: the sword is obviously not a firearm, while the replica trades on looking like one.
Bladed and blunt props
Swords, axes, staves, and armor are usually judged on function and material rather than on any single statute. Most convention policies bar live steel with a sharpened edge, functional bows with real arrows, and anything that could injure in a crowd, while allowing blunted, foam, resin, or clearly costume-grade versions, often peace-bonded so they cannot be casually drawn. As with firearms, the rules ramp up in public spaces outside the venue, where an openly carried realistic blade can trigger local weapons ordinances that have nothing to do with the con.
Where costumers get caught out
- Realistic resin or 3D-printed blasters modeled on modern handguns are the props most likely to be rejected, because they read as real to the public and to police.
- Repainting a brightly colored toy to look convincingly real is exactly what several state statutes target.
- Carrying a prop to and from the venue, on public streets or transit, is governed by local law, not the convention policy, and a realistic replica in public can draw a serious police response.
Brandishing, disorderly conduct, and open-carry rules differ from state to state and city to city, so the honest summary is that it varies by jurisdiction and you should check local law. The safest habits are simple: follow the convention’s published weapons policy to the letter, keep required safety markings in place, transport props concealed in a case rather than displayed, and treat instructions from convention security and the venue as final. If you are unsure whether a specific build is legal where you live or where the con is held, the local authority having jurisdiction and, for anything commercial, an attorney are the right sources rather than fellow attendees.
