The Sightmark Triple Duty Universal Boresight is a multi-caliber laser boresighting tool designed to help shooters get on paper faster during initial scope or sight setup.
- Type: Universal arbor-style laser boresighter
- Caliber Range: .17 to .50 caliber rifles and handguns
- Laser: Red laser, visible 15-100 yards
- Arbors Included: Three expandable mandrels (small, medium, large bore)
- Power: Three LR41 batteries (included)
- Material: Brass arbor body, polymer components
- Use: Initial sight alignment before live-fire zeroing
