Marbles Bullseye Rear Barrel Sight 2 3/4" Long

Marbles Bullseye Rear Barrel Gun Sight - 2 3/4" Long with Step Elevator. The moment the Marbles Bullseye sight is misaligned, the front sight drifts out of the center ring, signaling the shooter to cheek the stock and make correction. It's instantaneous, obvious, and fool proof-the Bullseye does this the same way peep sights naturally center the front bead in the aperture, but automatically. Teaming the Bullseye with one of Marbles Arms (c) front bead sights makes it double easy to stay dead on in any shooting light. Specs-Elevation adjustment .338"-.535", 6 adjustment steps in 0.030" increments.