scope mounts

Scope mounts are used to attach telescopic sights or other types of sights to firearms. The scope sight itself is usually made for only one of two main types of mounts, which can be classified as scopes for ring mounts, for example a 30 mm tube, or scopes for rail mounts, such as the Zeiss rail. Words such as mounts and bases are used somewhat loosely, and can refer to several different parts which are either used together or in place of each other as ways to mount optical sights to firearms.
When it comes to the interface of the firearm itself, the Picatinny rail is one of the most widespread standard for new firearms as of 2020. While most scopes are made for being mounted either with a ring mount or a rail mount, some sights have an integral mounting mechanism allowing them to be attached directly to the firearm, like for example an integrated Picatinny mount. There are many proprietary and brand-specific types of mounts that either can be used with Picatinny rails or as alternatives to Picatinny (see the section on Link between scope and firearm). Scope mounts may be offered by firearm and scope manufacturers, or on the aftermarket.

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