GF-BS4 Universal green laser bore sighter
GF-BS4 Universal green laser bore sighter,newly-improved
Laser bore sighting collimator system

GF-BS4 Green Laser boresighter

Output power:20mW Wavelength:532nm,overall length:175mm,Head dia.:21mm

Tail dia.:4.5mm,Battery:1xCR2 Lithium battery,

T6010 High class aluminum alloy in beautiful black matte finish,

Green Laser Bore Sighter Fits .177~.50 Caliber Rifle

6 rubber adapters,The 6 adaptors are self-expandable,Its precise enough so that it is good to fit into the barrel (not shaking).

Your boresighter consists of laser emitter as well as a series of expandable adaptors which cover .17 to .50 caliber diameters.There is also a larger adaptor designed for 20 Gauge shotguns.

Roll ON/OFF switch,
Nighttime range:>2 miles,(reach up to 12,000ft.)
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