Product: Feyachi Bore Sight .223 Rem 5.56mm NATO Red Laser Boresighter for Cal 223 556 with 3 Sets of Batteries
Brand: Feyachi
Features Adjust and zero-in your optic or iron sights without ever firing a round. High accuracy to reduce cartridges and shells wasted. Sturdy brass construction. Easy to sit perfectly in the bore. 
Specification Construction: Brass Length: 44.5mm; Tail width: 9.5mm; Head width: 6.3mm Laser Wave length (nm:) 632 to 650 Power: <5 mW Sighting Range: 15 - 100 yards Dot Size: 2" at 100 yards Temperature: -10℃ to 40℃ Battery Type:9 x AG3 (Included)
Class IIIA, less than 5mW 632-650nm red laser
Made to fit the .223 chamber, caliber specific.
3 sets (9 total) batteries. Each set lasts up to an hour.
Fastest gun zeroing and sighting system and reduce wasted cartridges and shells.
Easy to sit perfectly in the bore. Sturdy brass construction.

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