How do i know lazer is center?

Lay a magazine down flat on a table and place the laser in the magazine side groove. Point the laser at the wall, ideally 25m away but as far as the room allows. Rotate the laser in the magazine groove while observing the point on the wall. If the point remains constant the laser is center.

Do you close the bolt on this to secure it in the barrel when sighting?

Yes, but close it gently so that the sight is securely in place.

Can this laser aim point be adjusted or calibrated?

Yes, it can. It has adjustment screws. You will need a lathe or floor drill press with a straight quill. Turn it on and clamp it in the chuck, then slowly by hand, rotate the chuck. If it is aligned correctly, the laser point will not move. If it goes in a circle, it is not aligned. Adjust the setscrews until the laser dot does not move when the chuck is rotated. Do NOT turn the drill or lathe on! The further away you can set the laser dot, the more accurately you can align it. You cannot align it while it is in your firearm.

Why does it say “9mm rem gauge” ?? Is it for 9mm caliber pistols or for a shotgun?

It is for 9mm Parabellum ( 9x19mm). Works great.

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Bore Sight Laser 223 5.56mm/9mm/.243.308/12Gauge/7.62x39mm/.45acp Red Laser Bore Sighter with Batteries

Product ID: 48357680

Details

Brand
CVLIFE
Color
yellow
Compatible Devices
Handgun
Magnification Minimum
1 x 6 x
Material
Alloy Steel
Mounting Type
Picatinny

🎯Class IIIA precision laser <5mW

📏Accurate sighting 15-100 yards

⚙️Sturdy brass alloy build

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MOP$195

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Sold byAmazon MacauDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🎯 Lock in your shot, level up your game.

BUILT TO LAST - Rugged brass construction ensures durability through every range session.
COMPACT POWERHOUSE - Lightweight and perfectly sized for .223 REM and multiple calibers—carry it anywhere.
RANGE READY PRECISION - Reliable sighting from 15 to 100 yards means faster target acquisition every time.
UNIVERSAL COMPATIBILITY - Works seamlessly with .223, 5.56mm, 9mm, .308, 12 Gauge, and more—one tool for all your firearms.
PINPOINT ACCURACY ZERO WASTE - Cut your ammo costs with laser-guided precision that speeds up zeroing.

The CVLIFE Bore Sight Laser is a compact, Class IIIA red laser boresighter designed for multiple calibers including .223, 5.56mm, 9mm, and more. Featuring a durable brass alloy body and a sighting range of 15 to 100 yards, it enables faster, more accurate zeroing to reduce wasted ammunition. Lightweight and compatible with handguns and rifles, it’s a must-have precision tool for hunters and shooting enthusiasts aiming for flawless aim.

Specifications

ASIN	B07545BKZW
Best Sellers Rank	#4,681 in Sports & Outdoors ( See Top 100 in Sports & Outdoors ) #8 in Hunting Boresighters
Brand Name	CVLIFE
Color	yellow
Compatible Devices	Handgun
Customer Reviews	4.4 4.4 out of 5 stars (9,901)
Eye Relief	44.5 Millimeters
Item Dimensions L x W x H	1.75"L x 0.22"W x 1.75"H
Magnification Minimum	1 x, 6 x
Manufacturer	NANTONG CHENGXIN OPTICAL INSTRUMENT CO., LTD.
Manufacturer Part Number	US5700001
Material Type	Alloy Steel
Model Name	Laser bore sight 223 5.56mm
Model Number	223cal
Mounting Type	Picatinny Mount
Night vision	No
Objective Lens Diameter	9.5 Millimeters
Product Style	223 5.56mm
Reticle Type	laser dot
Sport Type	Airsoft, Hunting
Unit Count	1.0 Count

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