The G27 is the Mini or Sub-Compact .40 caliber handgun. Small, light, accurate and powerful: The GLOCK 27 is the backup weapon for all situations. Because of its comfortable dimensions and the known advantages of the GLOCK pistol family it is very popular with police on patrol duty, which is why many law enforcement agencies issue this subcompact .40 pistol also as an official backup pistol.
Gen 3 models come with two 9-round magazines. Gen 4 models come with three 9-round magazines. Gen 4 models cannot be sold into California expect to qualified Law Enforcement personnel.