Possum Hollow Bore Guide #201 - .270 Win, 308 Win, .300 Winchester Magnum Fits Heym SR21, Multi-Snout

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.