The Glock 27 is in a package small enough for a pocket or ankle holster. The pistol features Glock's Safe Action system which provides a consistent trigger pull from the first to the last round. The three automatic independently operating mechanical safeties are built into the fire control system of the pistol. All three safeties disengage sequentially as the trigger is pulled and automatically re-engage when the trigger is released; the extractor serves as a loaded chamber indicator to comply with the laws of certain states and its position may visually and physically indicate whether there is a cartridge in the chamber of the pistol.