WHAT DOES GLOCK NOMENCLATURE DIAGRAM MEAN?

The glass-reinforced nylon grip narrows near the top, offering a shallow channel with the thumb and trigger finger.Rear sight encompasses a generous u-notch for easy alignment plus a sq. front deal with for a person-handed cocking. Sight dovetails are sized to accept aftermarket Bodyguard-pattern sights.I also ran through a pair bins of Barnes Tac-