Narrowed down my search for some type of extended hand guard system to the following:
Weight added to Rifle
Factory Sling Mount
Retain Factory Front Sight
Allow piston removal for cleaning
M.I. SCAR Keymod Rail Extension
VLTOR SCAR KeyMod Handguard...
I just installed the rail on my Gen 2 PS90 and must say I love it. I was debating the light hanging from the side but saw some threads here with this rail and thought I would try it and I am glad I did. Plenty of room for several different configurations.