SiteLite Replacement O-Rings

Keep your SiteLite laser boresighter ready for your next range session with replacement O-rings for a variety of firearm calibers. These size-specific replacement packs help you maintain the correct fit for your boresighting setup, whether you're working with a rifle, pistol or shotgun. Select the O-ring size that matches your caliber to find the right replacement for your SiteLite boresighter.

Need O-rings for a specific caliber? Browse the individual replacement packs below. If you are looking for a replacement for the SiteLite factory O-rings, the SiteLite SL-ORINGSET replacement O-ring set is available as a complete set.