.38 SPL Red Laser Front Insert Arbor Boresighter Precision Fit

* Class IIIa 635nM Less Than 5mW. Clear and bright red laser. Avoid Direct Eye Exposure to Beam.* Fit for .38SPL. It is Front Insert Arbor Boresighter (without Muzzle Device).* It is a perfect Tool to sight in you Iron Sight, Red Dot and Scope.* Easy to sit perfectly in the bore with 4 sets rubber rings. * Sturdy BRASS construction.* 2 sets (6 total) of batteries