the rank of sub-inspector or head constable are authorized to carry a side arm, generally a Pistol Auto 9mm 1A or a Glock 17. Officers always carry side arms. Traffic police officers have fine books and other equipment. Firearms previously stocked at police stations included .303 Lee–Enfield rifles (now replaced), 7.62 1A self-loading rifles and SAF Carbine 2A1s, which have been replaced by AK-47 and INSAS rifles. The Ordnance Factory Board is a supplier of arms, ammunition, uniforms, bullet-proof vehicles, and mine-protected vehicles to the police. Only a station officer can allow the use of reserve guns in emergencies. During public unrest, protests or possible terrorist attacks, police are equipped by the state (or central) government. Special units at the state and federal level have automatic weapons, such as the AK-47, AKM and INSAS assault rifles and Bren guns. Special-forces and SWAT units use Heckler & Koch MP5s, Brügger & Thomet MP9s, AK-103s, M4A1 Carbines and others. Bulletproof jackets are generally not worn by state police, although special units carry tactical vests, gear, and weapons according to function. Mukhbir Informers (mukhbir) provide information for financial compensation. Police agencies budget for their mukhbirs because they are "the eyes and ears of police", and help resolve cases. In 2012, the Delhi Police budgeted 40 lakh ( 4 million) to pay their mukhbir ( 2,000 per inspector). Public perception In general, police in India lack public trust and are not viewed as legitimate authorities. People generally do not go to the police for help if given the choice, and often specifically take pains to avoid them. Oftentimes, when people do go to the police, it is "only for instrumental purposes, such as obtaining a First Information Report (FIR) as documentary evidence to be used to achieve some end". People expect the police be unhelpful at best, and corrupt or brutal "little tyrants" at worst. Former Union Home Minister P. Chidambaram characterised the police constable as "the most reviled public servant in India." Even police officers themselves often lack faith in the institution, as illustrated by an apocryphal story popular among officers where "a self-styled 'honest cop'" asks a group of fellow officers if they would trust their coworkers to take care of a family member in trouble — to which none of them said yes. Scholars usually tend to attribute the police's poor reputation in India to two main factors. First, the police