Abstract: A feature or provision specifically to aid in aligning the vertical and horizontal reticules with respect to the vertical and horizontal axes of the bore during the installation of a telescopic sight (scope) on a firearm which includes at least one mounting boss for securing the telescopic sight. This feature also provides a means of verification that the installed position has not changed during use, and a reference which will allow the scope to be returned to its original calibrated position should it need to be temporarily removed from its mount. This feature is an indexing system. It consists of markings on the scope body, which, when aligned with corresponding marks on the mounting hardware provide a quick, accurate, inexpensive, simple, and intuitive method of properly aligning the scope's vertical and horizontal axes with those of the firearm's bore during installation; and verification of that alignment thereafter without the use of accessory apparatus.

Abstract: A feature or provision specifically to aid in aligning the vertical and horizontal reticules with respect to the vertical and horizontal axes of the bore during the installation of a telescopic sight (scope) on a firearm which includes at least one mounting boss for securing the telescopic sight. This feature also provides a means of verification that the installed position has not changed during use, and a reference which will allow the scope to be returned to its original calibrated position should it need to be temporarily removed from its mount. This feature is an indexing system. It consists of markings on the scope body, which, when aligned with corresponding marks on the mounting hardware provide a quick, accurate, inexpensive, simple, and intuitive method of properly aligning the scope's vertical and horizontal axes with those of the firearm's bore during installation; and verification of that alignment thereafter without the use of accessory apparatus.