I've used two SS-series rails in builds and I find them to be well made and light. Simple mounting, with a barrel nut and jam ring. Loctite is recommended and included with the forearm. I did strip out the anti-rotation bolt in my first handguard - it was an early production model. Recently bought the second and it seemed to be a little thicker and the bolt didn't strip out of this one.
Good luck with the build.


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