The Glock 19M was developed for use by the FBI and served as the predecessor to the Gen5 line. The 19M includes all of the standard Gen5 features, With the addition of no front strap finger grooves; rifled barrel, crowned at the muzzle; improved trigger and stronger trigger safety pin; enhanced locking block, rails, ejector and firing pin; longer recoil spring assembly; ambidextrous slide releases/stops, both shielded; flared mag well; rounded mag release button; finger slot for forced mag extraction and exchangeable beavertail backstrap.
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