The Troy Modular AR-15/M4/M16 Rail Drop in Forend will fit any AR platform rifle that uses a mid-length gas system, 2-piece handguards, and a triangle front cap. Most M16 style rifles with an 18" barrel or longer use a rifle length gas system meaning this forend wouldn't be compatible.
The Troy Modular AR-15/M4/M16 Rail Drop in Forend is a 2-piece handguard that only fits rifles with a delta ring and handguard cap. It would not be compatible unless you install a delta ring and handguard cap on your rifle.
From what information I could find the Troy Modular AR-15/M4/M16 Rail Drop In Forend should work with the KAC Rail Covers.
The Troy Modular AR-15/M4/M16 Rail Drop In Forend is designed to fit a carbine length gas system that uses a delta ring and handguard cap. It is 7" in total length.
This handguard weighs 0.61lbs.
Yes, this will fit a Diamondback carbine, this is the 7" carbine handguard.
Please email us at techsales@opticsplanet.com so we can further answer your question.
Yes, this should fit any AR with standard carbine handguards.
These rails are compatible with your standard AR-15 rifle.
Yes, this should work for the FN15 Carbine.