The Troy AR-15 Drop In Enhanced BattleRail Handguard is a drop in replacement for polymer furniture on a carbine length AR15 handguard. It uses the delta ring and handguard cap to install, it will not use any screws/hardware.
Yes, this should fit.
Yes, this will fit a Colt 6920, and a QD attachment point is built into the handguard.
Yes, this will fit a round end cap.
Yes, this should fit a PSA 10.5 upper receiver with standard plastic handguards.
The inside diameter is 1.37 inch
Yes, this will fit a DPMS AR, as long as yours has standard plastic carbine hand guards.
Yes, this will fit the ATI Omni Hybrid, as long as yours has standard plastic carbine hand guards.
This weighs 0.9lbs.
No, this will not fit .308 applications, it is only for AR-15 platforms.