The SINCLAIR INTERNATIONAL 338 LAPUA O-Ring Rod Guide is designed to seal the barrel off from the receiver, preventing solvents from leaking into the action area.
This rod guide has been upgraded to include integral solvent ports, with the option to order a custom guide without ports at no additional charge.
It is compatible with a wide range of actions and bolt diameters, but FN Model 70s post-2010 require a custom rod guide due to different specifications.