Help guard a secret transaction taking place in the desert

This is the third quest given to you by Louis Salvatore. Mr. Salvatore wants you to help him guard a transaction he wishes to do with the Enclave.

When you talk to Mason for the details, you can either choose to go now, or wait. But don't wait too long or you'll miss the opportunity. When you accept to go with them you'll be sent to an outside location where five of Salvatore's guards and two Enclave soldiers are making the deal. Move around and you're liable to be attacked, so just wait patiently until the other guards leave, and follow them. Do not approach the Enclave soldiers or try to talk to them.

If you don't screw up, the transaction will go off without a hitch, and you'll be able to return and talk to Mr. Salvatore. You get 1000xp for completing the mission. If he asks you to become a Made Man of the Salvatores, and you accept, you get an additional 1000xp. When you talk to Mason after the quest, he hands you an armload of items, one of them is a Laser Pistol.

Being a made man gives you respect from others, but also makes you unable to go into the other family hideouts (without a fight to the death, that is). However, rejecting Salvatore's offer causes his guards to attack you. So either conclude your business with the other families, or be prepared for a fight when you return.

Before you go on the mission, if you've been respectful to Salvatore during the previous quests, you can request a laser pistol from him. Mason will give it to you, and if you ask he'll teach you to use it, improving your Energy Weapons skill.