Glock 17 vs Glock 18

1982–Present

1986–Present

12,000,000+ units (estimated worldwide across all generations and variants)

~250,000 estimated (including all variants)

204 mm (8.03 in)

204 mm (8.03 in) standard, 236 mm (9.29 in) on 18C model

114 mm (4.49 in)

102 mm (4.02 in) standard, 135 mm (5.31 in) on 18C model

625 g (1.38 lb) empty, 905 g (1.99 lb) loaded

625 g (1.38 lb) empty (standard), 730 g (1.61 lb) with 33‑round magazine

17 rounds standard; 19, 24, 31, 33, 45 round options available

33 rounds standard, 50‑round drum, 10‑round compact magazines available

Short recoil, locked breech, striker-fired with Safe Action trigger system (trigger safety, firing pin safety, drop safety)

Short recoil, locked breech, striker‑fired Safe Action system

Consistent ~2.5 kg (5.5 lb) pull, single‑stage Safe Action trigger

Safe Action striker‑fire with slide‑mounted fire selector (semi‑auto / fully‑auto)

Fixed polymer front post, fixed polymer rear notch; optional tritium night sights or aftermarket rail‑mounted optics

Fixed polymer rear notch and front post; optional tritium night sights and aftermarket rail‑mounted optics