I have a Knights system I may be willing to part with.
It comes with:
The 2pc rail system (the lower half has a heat sheald)
2-6 rib panels
1- Knights plastic roll case to keep the spair rib panels in.
1- Knights tactial forgrip
This system is used but works grate.
IT has seen a lot of range time and has served me well!
Feel free to e-mail me.