One thing about reticle devices with a bubble level, those things can break. And, it seems to me the goal is reticle alignment, true to the rifle. Some devices require external references, like indexing on a door frame, etc. The Reticle Tru is an internal system, not requiring external references, not sensitive to being "level". It is a tool for aligning the reticle with the axis of the rifle, level notwithstanding. IMHO, it's the elegance of simplicity.

DF

Last edited by Dirtfarmer; 09/06/12.