VFG attached to standard handguard

What is a good method to attach a VFG to a standard handguard? John recommened this one:

Long Forearm Rail

Is there a shorter one that won’t cover as many vent holes?

I don’t like forward grips on regular handguards, I’ve seen a few people during heavy use or training actually pull the whole bottom handguard off of the upper.

Ditto.

Save your pennies. A Surefire M73 is affordable and high quality.

Or even the MI two piece , 4 railed aluminum handguards.

It wouldn’t be permament - I just want to see how she shoots with a VFG. Found an inexpensive means to experiment.

2.5" center Picatinny rail for AR15/M16/M4