Although at first glance it can be difficult to distinguish between these two rail systems, a Picatinny rail is not the same as a Weaver. The size and shape of the slots is the main difference, with these slots being slightly smaller on the Weaver rail. The Picatinny rail also has square-bottomed slots while Weaver’s are rounded.

The only differences between the Picatinny rail and the similar Weaver rail are the size of these slots and the fact that they are standardized.

Picatinny to picatinny rail adapter allows you to mount two Picatinny rails back-to-back and can be used on anything with a Mil-Spec Picatinny rail. Available from 1″ to 6″ long, with or without Coyote Light logo.

Compatibility with Picatinny Many rail-grabber-mounted accessories can be used on either type of rail, and accessories designed for a Weaver system will generally fit Picatinny rails – although not vice versa. because the Picatinny locking slot width is 0.206 in (5.232 mm) vs the .

It was originally used for mounting of scopes atop the receivers of larger caliber rifles. Once established, its use expanded to also attaching other accessories, such as: iron sights, tactical lights, laser aiming modules, night vision devices, reflex sights, holographic sights, foregrips, bipods, slings and bayonets.

Because of this, Weaver devices will fit on Picatinny rails, but Picatinny devices will not always fit on Weaver rails. So those Weaver style rings that came with your new scope will work on both styles of rails.

Weaver rail. A Weaver rail mount is a system to connect telescopic sights and other accessories to rifles, shotguns, pistols, and crossbows. It uses a pair of parallel rails and several slots perpendicular to these rails.

Picatinny rails tend to be thicker than a 2 piece base set due to the ejection port relief cut in the bottom of the base which allows ejecting brass to clear. Since the rail covers the ejection port, it can make loading the firearm from the top difficult.