QD socket for MOE hg's?

I just realized the middy and rifle length MOE Magpul handguards don’t have slots that go all the way back. I like to plug my sling in closer to the receiver. Anyone have any suggestions how to accomplish this?

Using the orange search button at the top got me this.

https://www.m4carbine.net/showthread.php?t=36421

…and save yourself some time and start at the end of the thread and work backwards.

Thanks. I guess I’ll stand by for the IWC one.