This model of the NcSTAR AR15 Carbine Length Quad Rail is tan. There is currently not an FDE model.
The NcSTAR AR15 Carbine Length Quad Rail will fit AR15 platform rifles that use a carbine length gas system via the delta ring and front handguard cap. So as long as you have a delta ring and handguard cap this rail will fit.
The NcSTAR AR15 Carbine Length Quad Rail will work with a Ruger AR556 Carbine that uses GI Handguards caps and Delta Ring.
Yes. The NcSTAR AR15 Carbine Length Quad Rail will fit utilizing your existing delta ring and handguard cap. You can also purchase a delta ring tool to assist in the installation process. You can find a delta ring tool using the link below:
https://www.opticsplanet.com/wheeler-delta-ar-15-delta-ring-tool.html
No. The NcSTAR AR15 Carbine Length Quad Rail will only fit AR15 platform rifles that utilize a carbine gas system and delta ring with a handguard cap.
Yes, this handguard should fit that rifle.