The US has a law to limit the liability of gun manufacturers.

The Protection of Lawful Commerce in Arms Act (PLCAA) is a U.S law, passed in 2005, that protects firearms manufacturers and dealers from being held liable when crimes have been committed with their products. Both arms manufacturers and dealers can still be held liable for damages resulting from defective products, breach of contract, criminal misconduct, and other actions for which they are directly responsible. However, they may be held liable for negligent entrustment if it is found that they had reason to believe a firearm was intended for use in a crime.