I
- IBRAP
- Alpha GPI (Brazil - Submachine Gun - 9×19mm Parabellum)
- IG12 AOW Shotgun
- I.M. Arms
- I.M. Arms Model 1 Double Barrel SMG
- I.M. Arms Model 2 Double Barrel SMG
- I.M. Arms Model 3 Double Barrel SMG
- I.M. Arms Model 5 SMG
- I.M. Arms Model 6 SMG
- IM Metal HS2000
- IMBEL
- ALAC
- IMBEL MD2 Assault Rifle
- IMBEL MD3 Pistol
- IMBEL MD 97 Assault Rifle
- IMBEL IA2
- Mosquefal
- IMI Baby Eagle
- IMI Barak
- IMI Corner Shot
- IMI Desert Eagle
- IMI Dror
- Galil AR
- IMI Galatz's
- IMI Galil SR-99
- IMI Galil MAR
- IMI Magal
- IMI SP21
- IMI Uzi
- IMI Mini-Uzi
- IMI Micro-Uzi
- IMI Para Micro-Uzi
- IMI Negev
- IMI Tavor
- IMI Tavor 2
- IMI Timberwolf
- IMI Uzi Pistol (Israel - Pistol - 9×19mm Parabellum, .45 ACP)
- INDEP Lusa A2
- Indumil
- Indumil IMC-40 (Colombia - Grenade Launcher - 40mm)
- Indumil ONE (Colombia - Shotgun)
- Llama Revolver (Colombia - Handgun - .38 Special)
- Industrias Marcati
- Ariete 62 (Argentina - Rifle - .22LR)
- Bataan Super 54 (Argentina - Rifle - .22LR)
- Bataan 71 (Argentina - Shotgun - 12 Gauge)
- Modelo Z-82 (Argentina - .22LR)
- Ingram Model 6
- Ingram SAM-1 (US - Carbine - 5.56×45mm NATO)
- Ingram SAM-2 (US - Carbine - 7.62×39mm)
- Ingram SAM-3 (US - Carbine - 7.62×51mm NATO)
- Ingram Durango
- Ingram Model 10
- Ingram Model 11
- INA Model 953
- INSAS
- INSAS AR556
- INSAS 5.56 mm
- Interdynamic MP-9
- International Ordnance
- International Ordnance MP-1 (US - Machine Pistol - 9×19mm Parabellum)
- International Ordnance MP-2 (US - Machine Pistol - 9×19mm Parabellum)
- INTRAC HS95
- Intratec AB-10
- Intratec CAT-380
- Intratec CAT-45
- Intratec CAT-9
- Intratec TEC-DC9 (US)
- Intratec PROTEC-25
- Intratec Tec-22 pistol
- Ishapore
- Ishapore .410
- Ishapore 2A
- Ishapore Armory No.7 Jungle Carbine
- Ishapore No 1 Mk III
- Ishapore No 4 Mk 1
- Istiglal (Azerbaijan - Anti Material Rifle - )
- ISTEC
- ISTEC ISL 200 (UK - Grenade Launcher - 40mm)
- ISTEC ISL 274 (UK - Grenade Launcher - 40mm)
- Itajuba Model 954 Mosquetao (Brazil - Battle Rifle - .30-06)
- Ithaca Auto & Burglar (US - SxS Shotgun/AOW - 20 Gauge)
- Ithaca M37 (US - Pump Action Shotgun)
- Ithaca M-6
- ITM AT84-S
- Iver Johnson 1946
- Izhmash 1130
- Izhmash MP412 REX
- Izhmash P6 (PM69)
- Izhmash TSV-1
Read more about this topic: List Of Firearms