John, Is your mount meant specifically to bridge the gap between the receiver and upper hand guard? It looks like it might straighten any minor differences out and looks solid.
Yes.
The handguard will need to properly space the slot for the mount.
Most do.
G rails.
Midwest rails.
SLR rails.
It stabilizes the upper/handguard joint.
John Burns
I have all the sources. They can't stop the signal.