COP .357 Derringer vs Glock 18

1983–Present

1986–Present

~150,000 estimated

~250,000 estimated (including all variants)

140 mm (5.5 in)

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

63 mm (2.5 in)

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

0.5 kg (1.1 lb) empty

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

4 rounds (integral barrel cluster)

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

Double‑action only; four independent hammers cocked sequentially by a single trigger pull

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

Heavy double‑action trigger with a long pull, no single‑action mode

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

None; optional low‑profile notch milled into the top of the frame for limited aiming

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