Thanks Bob!
I have done a bunch of free floats. As Kwando alluded to using the factory pinned FSB is your best bet if you want absolute piece of mind against a gasblock working loose.
Trimmed down correctly and Parkerized they look good and can fit under the slimmest rails. Plus they won't rust.
I think what Bob is referring to is where I notched a tube for a standard FSB. IIRC it was a middy gas system with a rifle length forend.
Turned out really well and it made sense, full length rail and the use able front sight.





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