Glock 17 vs Glock 31

1982–Present

1998–present

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

Unknown

204 mm (8.03 in)

189 mm

114 mm (4.49 in)

114 mm

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

0.66 kg

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

15 rounds

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

Recoil-operated, locked breech

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