Possum Hollow Bore Guide #41 - .300 Rem Ultra Mag, 7MM Rem Ultra Mag Fits Rem 700, Win Model 70, Mauser

Aligns the cleaning rod centrally to the bore to prevent throat or rifling damage. O-ring seals the chamber and prevents solvents from contaminating the action and trigger and helps to keep the bore guide firmly in place. Large replacement O-ring fits all guides and solvent port.