IP: mcstrike.net - (NO MODS REQUIRED!)
MCStrike is a gun gamemode server dedicated to making guns in Minecraft feel fun! It's developed by The Noxcrew and currently includes:
Team Deathmatch, Deathmatch, Search & Destroy, Mutated (Infected), clans (With clan leaderboards), 4 classes, 55 levels per prestige, 10 prestiges, 8 different primary weapons, 10 different pieces of equipment, very active admins that listen to the community, and lots of game improving updates quire regularly.
We're currently the only server out there to offer a PROPER 'infected' gamemode that we called 'Mutated'. So come try it out, it's super fun and has many, many, scary custom sounds.
Links:
Website: http://mcstrike.com/
Donations: http://store.mcstrike.com/
Noxcrew Site: http://noxcrew.com/