Gun laws are often enacted with the intention of reducing the use of small arms in criminal activity, specifying weapons perceived as being capable of inflicting the greatest damage and those most-easily concealed (such as handguns and other short-barreled weapons). Persons restricted from legal access to firearms may include those below a certain age or having a criminal record. Firearm licences may be denied to those felt most at risk of harming themselves or others, such as persons with a history of domestic violence, alcoholism or substance abuse, mental illness, depression or attempted suicide.