Originally Posted by scoony
Is there actually a published spec for rail spacing? Who would be the authority on that spec?

Yes.

Pic rail specs

The issues is dummies like above buy rails that don't continue the slot spacing from the upper.

In other words the slot spacing on the rail by itself is fine but is not in time with the slot spacing of the upper.

Aero does this for some unexplained reason while the vast majority of quality manufacturers follow the Mil Spec and time slot spacing to the upper.

The dummy above never took the time to see that my riser is in spec but instead bitched because his setup was out of spec.

John Burns

I have all the sources.
They can't stop the signal.