Vortex Optics Lo Pro Bubblevel - 34mm
Manufactured by Vortex Optics
The slim, low-profile design of the Vortex Lo Pro Bubblevel allows it to be mounted on most scopes without requiring the removal of your optic. It is clearly visible without losing the sight picture. Mounts quickly and easily to the riflescope tube. Made in the U.S.A.