Welcome guys a hacker from the GTA 5 community came across a coding for the future DLC Weapons which to come in the Heist Update!
Well check him out:http://www.se7ensins.com/forums/threads/leaked-future-dlc-weapons.1141769/
Also I made a video for you guys who wanted extra information about the future DLC weapons!
https://www.youtube.com/watch?v=lgAgSqH_kYk