The Accurate Mag Long Action Bottom metal Kit SSSF comes in 3.715, 3.775 & 3.850 Magazine lengths for 300 Winchester Magnum and 338 Lapua Magnum. In some cases they are direct upgrades for internal box magazine rifles to Detachable Box Magazine (DBM) rifle configuration. All bottom metal kits may or may not need inletting to fit your rifle stock Long Action Bottom Metal Kit Includes:Pillar SetScrew Set (Over Sized)AM Trigger Guard