500Nitro,

Disclaimers are sometimes seen on antique guns in the USA however the typical disclaimer is tagged onto a firearm that should not be fired for safety reasons.

A current example of this is the 1871 Mauser rifles being sold by one company, they are probably strong enough for use but they are advertised as being for display purposes only and "seller not liable for damages or injuries" if the buyer decides to shoot it.

Richard.