Feyachi BS51 Green Bore Sight - 9mm Laser Boresighter Laser Boresighter it can still work well

it can still work well in 1 meter water depth

Specification:

Parallax Corrected & Unlimited Eye-relief

1 x MP23 Picatinny Pressure Switch Mount

Feyachi BS51 Green Bore Sight - 9mm Laser Boresighter Laser Boresighter it can still work wellAbout this item Parameters Class IIIA, less than 5mW 510 520nm green laser zeroing boresighter. ApplicationThe 9mm laser sight for 9mm chamber, specific caliber. Aiming range is 30 to 300 yards. Highly accurateBright and clear green dot laser zeroing and aiming system saves you time, money and ammunition. Design Sturdy and durable brass construction, light and compact, and easy to sit perfectly in the bore. Battery3 sets of (9 LR41) batteries. Each