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- Daewoo
- Daewoo DAR-21 (South Korea - Assault Rifle - 5.56 mm NATO)
- Daewoo DH380 (South Korea - Pistol - 9 × 17 mm/.380 ACP)
- Daewoo DH40 (South Korea - Pistol - .40 S&W)
- Daewoo DH45 (South Korea - Pistol - .45 ACP)
- Daewoo DP51 (South Korea - Pistol - 9 × 19 mm Parabellum)
- Daewoo DR-200 (South Korea - Assault Rifle - 5.56 mm NATO)
- Daewoo DR-300 (South Korea - Assault Rifle - 7.62 × 39 mm)
- Daewoo K1 (South Korea - Compact Assault Rifle - 5.56 mm NATO)
- Daewoo K1A (South Korea - Compact Assault Rifle - 5.56 mm NATO)
- Daewoo K2 (South Korea - Assault Rifle - 5.56 mm NATO)
- Daewoo K3 (South Korea - LMG - 5.56 mm NATO)
- Daewoo K4 (South Korea - )
- Daewoo K5 (South Korea - )
- Daewoo K6 (South Korea - )
- Daewoo K7 (South Korea - SMG - 9 × 19 mm Parabellum)
- Daewoo USAS-12 (South Korea - Shotgun - 12 Gauge)
- Daisy 600 (US - Bolt Action Rifle - .50 BMG)
- Daisy BB Gun
- Daisy-Heddon VL (US -
- Daisy V/L (US, first production rifle to employ caseless ammunition)
- Dan Wesson M1911 ACP Pistol
- Dardick Models 1100 and 1500 (US - Pistol - .38 Dardick tround)
- Davis Warner Infallible (US - Pistol - .32 ACP)
- DD44
- DD46
- DD49
- Deer gun (United States of America - 9 mm)
- De Lisle Carbine (UK - Bolt Action Carbine - .45 ACP)
- Desert Eagle (I.M.I. Israel Military Industries - Pistol - High-Powered Capacity)
- DEB-M21
- Del Prado machine gun (Argentina - Machine Gun - 7.65x53mm Argentine)
- Demro TAC-1 (U.S. - Semi-automatic Carbine - .45 ACP or 9×19mm Parabellum)
- Destroyer carbine (Spain - Bolt Action Carbine - 9 × 23 mm Largo)
- Detonics Combat Master Mk 6 (US - Pistol - .45 ACP)
- Detonics Combat Master Mk 7 (US - Pistol - .45 ACP)
- Devel M59 (US - Pistol - 9 × 19 mm Parabellum)
- D.G.F.M
- Systema Colt Modelo 1927 (Argentina - Pistol - .45 ACP)
- Diemaco
- Diemaco C7
- Diemaco C7A1
- Diemaco C7A2
- Diemaco C7CT
- Diemaco C7FT
- Diemaco C7LSW
- Diemaco C7LSW99
- Diemaco C7-M203A1
- Diemaco C8
- Diemaco C8A1
- Diemaco C8A2
- Diemaco C8CT
- Diemaco C8FT
- Diemaco C8FTHB
- Diemaco C8SFW
- L119A1
- Diemaco C8SFSW
- Diemaco Chain Gun
- Diseños Casanave
- Diseños Casanave SC-2005 (Peru - Assault Rifle - 5.56×45mm NATO)
- Diseños Casanave SC-2009 (Peru - Assault Rifle - 5.56×45mm NATO)
- Dlask Mini Moose
- DMAX .45 ACP Carbine
- DOG-1 Revolver
- Downsizer Corporation WSP Subcompact pistol
- DP LMG
- DPM LMG
- DPMS A-15 Jungle Wolf
- DPMS Kitty Kat
- DPMS Panther Bull A-15
- DPMS Panther Arms Series
- Dragoon Pistol British single shot pistol issued in around 1830
- Dragunov SVD (Russian - Semi-Auto Rifle - 7.62 × 54 mm R)
- Dreyse M1907 (Germany - semi-auto pistol - 7.65 mm ACP)
- RM & M Dreyse (Germany - semi-auto pistol - 9 mm Parabellum)
- Dreyse needle gun (Germany - single round, bolt action - 15.43 mm)
- DShK Machine Gun (Russia - Machine Gun - )
- Dual Cycle Rifle (US - Assault Rifle - )
- DWM Artillery Luger
- DP LMG (Soviet Union-auto heavy machine gun7.62x54mmR)
Read more about this topic: List Of Firearms