The Platinum Series receiver half will NOT work as a replacement. If you need to replace this body half, you will have to get a complete gun. This receiver half has the newer matte finish and is milled for the newer push sear setup. It works with all ACT Custom Pro's and all ACT 98 Customs. It is also reverse compatabile with non ACT push style sear bodies. Accepts: All current Tippmann internal upgrades.