In France, carrying a weapon is strictly regulated by law. Carrying a holster or a firearm in the street is generally prohibited, except for certain professions regulated by law, such as police officers, Gendarmerie officers, Customs officers, military personnel on duty, cash-in-transit guards and SNCF security officers.
For ordinary citizens, carrying a firearm or a holster in the street is illegal, except in very specific circumstances, such as transporting a disassembled weapon stored in a suitable case, for a legal and authorized use.
In any event, it is important to check the laws in force in your area and to strictly comply with all legal regulations and procedures regarding the carrying of weapons. Failure to comply with these laws can result in severe penalties, including prison sentences.