- "K" (MH ver. SGT-Tanker) 3
- "KaMi" Daniel D 2
- K'rool 33
- K'rool and Alpha 2
- K. Jockey 2
- K. Rutkowski (War Mech) 6
- K1A14G86 4
- KARMATIZED 2
- KAZUA 3
- KENNI 2
- KILLIGULA 2
- KILLMAN 2
- KIMOSUGI CowCowCowCowCowCowCowCowCowCowCowCowCowCowCowCowCowCowCowCowCowCow 2
- KING B 4
- KINGshinobi 7
- KJ Olson aka MoUtH4WaR 5
- KJS 2
- KLINGON HONOR GUARD TEAM 2
- KOFF 3
- KS 3
- KT 3
- KaKeMIX 4
- KaMi 4
- KaPLaN 3
- KaRaR 2
- KaRn 3
- Kaal"TheSinew"979 40
- Kaal"TheSinew"979 *Edit*by-KeLLeR 15
- Kaal"TheSinew"979 *Edit*by-KeLLeR & EvilGrins 2
- Kaal979 45
- Kabby Mac 2
- KageOni[] 2
- Kai-Eerik "Turha." Komppa 2
- Kain 28
- Kaithofis 2
- Kal Corp 18
- Kamakazi 3
- Kamek 2
- KamiKaze 3
- Kamil 'Jammer' Wolnikowski 4
- Kamil R 2
- Kangus 7
- Kantham 32
- Kaoh 2
- Karl 'The Machine' Mitton 9
- Karlos 2
- Kart 4
- Kasarul 4
- Kasper "Coreper" van de Laar 7
- KastoR 3
- Katana (Co30) 2
- Katts Meow 2
- Kayako 13
- Kayron James Mercieca (007) 2
- KazeoHin 4
- KeLLeR 10
- Keggie 2
- Keitaro 3
- Keith "swag" Balding 2
- Keith Hogan=Maytagman 4
- Keith MIller (killex) 7
- Keith Schuler 5
- Kejim 4
- Kel Rutkowski 2
- Kelly Barnard 2
- Kelly Rutkowski 2
- KellyCuRe 5
- Kelly{CuRe} 6
- Kelvin 'WhiteRaven' Beaumont 2
- Kempel 3
- Ken "Noogy" Ng 2
- Ken "Quick" Paddle 12
- Ken ''DrunKenobi'' Lynch 15
- Ken '[-SS-]RoKyT' Bryant 3
- Ken Finnell -WiCkEdNeSs- 11