in regame now you can do this and a lot more without plugin you can set cvars the way you want for all weapons
PHP Code:
// The default primary (rifle) weapon that the Ts will spawn with.
// Usage: "awp m4a1 mp5navy"
//
// Default value: ""
mp_t_default_weapons_primary ""
// The default secondary (pistol) weapon that the Ts will spawn with.
//
// Default value: "glock18"
mp_t_default_weapons_secondary "glock18"
// The default grenades that the CTs will spawn with.
// Usage: "hegrenade flash sgren"
//
// Default value: ""
mp_ct_default_grenades ""
// Whether Counter-Terrorist player spawn with knife.
// 0 - disabled
// 1 - enabled (default behaviour)
//
// Default value: "1"
mp_ct_give_player_knife 1
// The default primary (rifle) weapon that the CTs will spawn with.
// Usage: "awp m4a1 mp5navy"
//
// Default value: ""
mp_ct_default_weapons_primary ""
// The default secondary (pistol) weapon that the CTs will spawn with.
//
// Default value: "usp"
mp_ct_default_weapons_secondary "usp"
you can use config per map too if you want different weapons in different maps