You had to remove fm_ prefix. Only give_ithem. Advice to future , you should look to include and find expression. Here you are
Code:
give_item(id, "weapon_knife")
give_item(id, "weapon_usp")
give_item(id, "weapon_m4a1")
give_item(id, "weapon_hegrenade")
give_item(id, "weapon_flashbang")
give_item(id, "weapon_smokegrenade")