add any entity and in its properties change it to "weapon_ak47" So you would change Info_player_terrorist (or what ever you use) to weapon_ak47. (or what ever weapon name)
someone said no where it said anything about "Counter-Strike". Before SDK it says Source. Meaning one thing For half-life 2's multiplayer. Next time don't be an ass hole.
http://www.steampowered.com/platform/update_history/Source%20SDK.html
At the top it says Source SDK.