I am not entirely clear on what you wish to do.
Please clarify or reword your statement.
I believe you wish to install a rail on your hand guard but are not sure if it will mount properly? I assume you have a standard hand guard that is not railed.
Inspect your front foregrip/handguard and see if there are any screw holes to mount that rail piece. If not then it is up to you to decide if you wish to drill some.
"Its only a little bit on fire"