Droop-resistant stems and adapters for boresighting weapons

摘要

A stem or adapter for boresighting weapons includes a first portion having a weapon insertion end including a centering device including a plurality of fingers which compress upon insertion into a bore of a weapon. A second portion has a first end attached to an end of the first portion opposite to the weapon insertion end. The second portion has a coupling end including an attachment feature opposite the first end for attaching another member thereto. The second portion is largely tungsten carbide, and the first portion is formed from a material that is largely not tungsten carbide to provide sufficient flexibility to allow the fingers to spring load when inserted into the bore of the weapon.