http://timesofindia.indiatimes.com/articleshow/1899242.cms
"Pen pistols cannot be detected easily unless opened and checked thoroughly. A person carrying a pen pistol can walk past the airport security without any hassle. According to the Central Forensic Science Laboratory (CFSL) in recent years as many as 10 pen pistols were sent by security agencies from various parts of the country to its ballistics wing. "With a pen pistol, a person can be shot at from point blank range,". In a pen pistol, a 0.22-inches cartridge is loaded and the pistol can be fired at a close range, perhaps up to a distance of five feet. On examination of some of the pen pistols that have been recovered from terrorists in India, it was found that the steel or metallic pens looked simple and raised no suspicion. " [Brief]
