An apparatus and method to install and index an eccentric noise suppressor. Once a noise suppressor is threadedly secured about the bore of a firearm a retention collar may be released by un-securing a retention cap. Releasing the tension which is placed on the retention collar affords the user an option of orienting the noise suppressor to any position which may be achieved by rotating the noise suppressor about the longitudinal axis of the barrel. This allows the user to place an eccentric noise suppressor in a position which does not obscure the sites of a handgun.