Opportunities to Buy CMP offers many opportunities to buy – and service – vintage rifles, including direct sales, auctions and custom gunsmithing.  If you are looking to completely outfit a custom M1 Garand, we have resources for you, as well! The federal law that established the new CMP authorizes the Corporation to sell surplus .30 and.22 caliber military rifles, parts and ammunition to qualified U.S. citizens “for marksmanship”. Accordingly, the CMP sells government-surplus M1 Garands, .22 caliber target rifles and small quantities of other rifles to qualified purchasers.