Not at all dumb, dumb is not asking a pertinent question.
CMP is the Civilian Marksmanship Program. It was initiated by congress when politicians had more common sense in order to help gun clubs get into more marksmanship training, competition and practice so the nucelus of young men going into the military could have a better chance at surviving on the battlefield. It works too.
The CMP can/does provide both weapons, on loan, and ammo to honest gun clubs that meet the qualifications and promise to support training and to keep firm control on the surplus guns and ammunition they receive.
The Director of the CMP, usually a military officer, can also authorise the purchase of guns, parts and ammo to qualified civilians for personal use. I and my wife got a 1903-A3, two M1 carbines, a M1922 and some parts through the program years ago. Would like to get a Garand now but really have no justification for it so I'll let mine go to some youger fellow I guess.
The "tournament" part must come from the fact that qualifing to purchase weapons requires that the applicant have actually participated in a few formal matches and have the documentation to prove it.