No, this will not be compatible with the PS10 platform.
No, this AR-308 2-piece mid-length handguard designed for DPMS LR-308 Low Profile rifles will not fit the Rock River Arms (RRA) LAR-8.
No. This Sniper AR .308 Quad Rail Handguard is designed to fit the .308 platform and not AR15/5.56 platform. I would recommend the UTG Pro AR15 Carbine Length Drop-in Quad Rail found using the following link:
https://www.opticsplanet.com/leapers-utg-pro-made-in-usa-model-4-carbine-length-tactical-quad-rails.html
No, this handguard is for DPMS 308 receivers and will not be compatible with an AR-15.
No, this will not be compatible.
No, this will not be compatible.
This only fits a triangle retaining cap.
Yes, this should fit.
Both this handguard and the Bushmaster are DPMS low profile. This is for a mid-length gas system with a triangle retaining cap, if your rifle also uses a mid-length gas system and has a triangle retaining cap, then this will be compatible.