| K31 Rifle |
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| KA74 blaster rifle (PP-19-01 Vityaz) |
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| KAC PDW |
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| KE Arms KE-15 |
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| KGP-9 |
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| KJW MP-05 Hi-Capa |
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| KPV |
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| KPV heavy machine gun |
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| KPVT |
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| KRISS Vector |
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| KS Fire Bottle |
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| KSC M93R |
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| Kabyle Musket |
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| Kahr CW9 |
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| Kahr K9 Stainless |
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| Kahr M9098 Elite 2003 |
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| Kahr MK9 |
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| Kahr P9 |
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| Kahr PM9 |
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| Kahr T9 |
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| Kalashnikov LMG 1943 |
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| Kalashnikov PKM |
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| Kampfpistole Z |
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| Karabinek wz. 1898 |
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| Karabinek wz. 29 |
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| Karabinek wz.29 |
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| Karabiner 1888 |
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| Karabiner 98AZ |
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| Karabiner 98a |
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| Karabiner 98b |
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| Karabiner 98k |
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| Karabiner 98k "Kriegsmodell" |
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| Karabiner 98k Sporter |
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| Kasapanos Explosive Charge |
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| Kayaba Type 90 flare pistol |
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| Kbk wz.88 Tantal assault rifle |
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| Kel-Tec KSG |
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| Kel-Tec KSG Patrol |
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| Kel-Tec KSG Tactical |
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| Kel-Tec KSG-25 |
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| Kel-Tec P-11 |
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| Kel-Tec P-3AT |
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| Kel-Tec PF-9 |
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| Kel-Tec PMR-30 |
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| Kel-Tec RFB Carbine |
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| Kel-Tec SUB-2000 |
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| Kentucky Flintlock Musket |
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| Kentucky Flintlock Rifle |
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| Keppeler & Fritz KS II Precision |
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| Keppeler KS V Bullpup Sniper |
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