i need advise on vertical grips/reail

i bought a vertical grip and rail for my m4 match target. i can see where it fits on the bottom of the hand rail. but i don’t know how to get the washer/screw thing into the holes to screw the rail to the handguard. do i need to have a gunsmith do this for me? and/or does anyone know how to tell me how to do it myself. i kinda bent up a little the heat shield in the hand guard.

can someone please tell me what to do to get the freaken rail and vertical grip on my gun. thank you!

i bought a vertical grip and rail for my m4 match target. i can see where it fits on the bottom of the hand rail. but i don’t know how to get the washer/screw thing into the holes to screw the rail to the handguard. do i need to have a gunsmith do this for me? and/or does anyone know how to tell me how to do it myself. i kinda bent up a little the heat shield in the hand guard.

can someone please tell me what to do to get the freaken rail and vertical grip on my gun. thank you!