The BSA Universal Multi-Caliber Boresighter Kit (brand part no. BS30) from BSA Optics is a collimator-style boresighter built to get a rifle or pistol on paper before the first live round ever leaves the muzzle. It ships with 15 interchangeable arbors spanning roughly .177 caliber up through .50 caliber, so one kit covers nearly every rimfire and centerfire bore a shooter is likely to own. Instead of burning ammo walking rounds onto a fresh optic, the arbor seats in the muzzle and aligns the reticle to the bore axis in seconds. It’s a smart first purchase alongside any new scope, red dot, or replacement barrel.

Key Specifications

• Includes 15 arbors covering roughly .177 through .50 caliber, so it fits nearly any rimfire or centerfire bore in the safe.
• Overall kit length measures 11.75″, sized to store flat inside its case.
• Packaged in a heavy-duty hard case that keeps every arbor organized and protected between range trips.
• Ships at 2.9 lb., light enough to toss in a range bag alongside a cleaning kit.
• Built as a kit-style boresighter, meaning every arbor and accessory needed for setup is included out of the box.

Frequently Asked Questions

Does this work on both rifles and pistols? Yes, the 15-arbor set is designed to span common rifle and pistol bore diameters from .177 up to .50 caliber.

Do I need a spotting scope to use it? No, a boresighter aligns the reticle to the bore visually at the muzzle, giving a rough zero you then confirm and fine-tune on paper.

Is storage included? Yes, the kit comes packed in a heavy-duty hard case that holds all 15 arbors.

Buy the BSA Universal Multi-Caliber Boresighter Kit

Mounting a new scope or sight is the perfect time to reach for a boresighter, and the BSA Optics kit makes the job painless with an arbor for nearly every caliber in the house. Order it from our Lubbock, Texas gun shop for fast, insured shipping right to your door.