SME Sight-Rite Laser Bore Sighting System 20 Gauge Brass Casing

The SME Sight-Rite Laser Bore Sighting System is a precision boresighting tool purpose-built for 20 Gauge shotguns. The body is machined from a real brass casing, so the unit chambers exactly like a live round and seats perfectly in the bore for factory-aligned centering - no universal arbor adapters, no guesswork.

A high-output laser projects straight down the barrel, letting you zero or confirm a scope, red dot, or bead sight without firing a single shot. That means less ammo burned, less time at the bench, and faster transitions when you swap optics between slug guns, turkey rigs, or clay setups. Each unit is individually caliber-aligned at the factory for the 20 Gauge bore, so what you see on the target paper is exactly where your optic will hold at distance.

Powered by an LR44 button cell battery, the compact brass housing tucks easily into a range bag, shotgun case, or pocket. If you are sighting in a new optic, verifying zero after transport, or dialing in a freshly mounted sight, the SME Sight-Rite gets your 20 Gauge on paper quickly and repeatably.