Question about picatinny rails

[Cgregg90]

These are both considered picatinny rails. But as you can see they’re both different. My scope mount doesn’t mount right to the one on the right so I’m looking for the reference name for the one on the left if there is one. Something to confirm that I’m buying this specific rail. Thanks

 

[nervoustrig]

Probably Weaver.

Picatinny vs. Weaver Rails - What's the Difference?

Picatinny and weaver rails are two common ways to mount accessories to a firearm. In this article, we explain the differences and advantages of each system.

www.targetbarn.com

 

[bigHUN]

There are "picatinny rail" and "NATO rail" standards, non is that one for the left side.

The two rails are very similar in size, the dimensional stack up tolerance actually overlaps.

 

[MikeVV]

Yeah -

1 - 1913 Picatinny
2 - Weaver
3 - Nato
4 - 11mm (no locking lugs)
5 - 13mm (no locking lugs)
6 - Mixture of 1, 2 and 3
7 - Mixture of 4 and 5

THEN...because there is no, single "National Standard" dimension, that EVERYONE uses. Machining and or casting these rails, the people can make anything that they think is good for them, or any combination of the three above.

THEN...again...there is the "adapters" that go from 11mm dovetail, and THEN...13mm dovetail rails.
I've noticed that one of the adapters isn't very accurate, the Eagle adapters seem to fit the best, but again... Notice that the Eagle adapters have BOTH, Picatinny adapters for...both the 11mm and the 13mm rails (dovetail).

Again, NO..."National Standard" that everyone abides by.
No one is forcing them to, it just not important enough to spend money on to police ALL of the many rail manufacturers.

Mike