Dial in your accuracy and streamline your setup with the AimShot Red Laser Bore Sight Kit-the ultimate multi-caliber zeroing solution for hunters competitive shooters and firearm enthusiasts.Built around the trusted .223 Remington laser bore sight module (BS223) this all-in-one kit offers unmatched caliber versatility extended runtime and precision targeting right out of the box.Crafted from high-quality brass for durability and chamber-fit reliability this chamber-mounted laser bore sighter delivers pinpoint red laser alignment for rapid scope and sight adjustments.Included in the kit are caliber-specific arbors (AR243 and AR3006) allowing you to easily adapt the laser to popular calibers like .243 Win .308 Win and 7.62x54mm-saving time ammo and effort across multiple rifles.The BS223 module can be powered in two ways:(1) With compact LR41 internal batteries for portability or with the included external battery pack using AA batteries providing up to 20 hours of continuous runtime-ideal for long range sessions or multi-rifle setups.(2) The external battery pack also includes a magnetic attachment and on/off switch for easy control during sight-in.Everything fits neatly into a sleek zippered storage pouch making this kit as portable as it is powerful-perfect for range bags field kits or home workbenches.Features / SpecsManufacturer: AimSHOTSKU #:MBS-Kit3Red laser bore sight.223 Remington with multiple caliber arborsAdapts to fit most popular rifle calibersInternal battery or external AA battery pack (both options included)Zippered nylon storage caseFits in the Following Chambers:223 REM and 5.56NATO243 WIN and 308 WIN7MM-08 and 260 REM338 FED and 256 WIN358 WIN and 307 WIN7.62x54R and 7.62x51444 MARLIN and 356 WIN7MM STE and 30-0625-06 and 270 WIN35 WHELEN and 338-06280 REM and 300 SAVAGE7 8 and 9MM MAUSER264 WIN and 300 WIN300 WEA and 7MM REM MAG340 WEA and 257 WEA358 NORMA MAG and 308 NORMA MAG338 WIN MAG and 7.62x39220 SWIFT and 303 BRITISH35 REM and 7MM