In terms of durability a FSB is unbeatable. As far as rail-flex shifting point-of-aim a FSB cutout rail is the best set up. Why don't we see more FSB cutout rails?
I would like to see a free float 15" mid-length FSB cutout rail in keymod or m-lok. Both a two piece version for use with a standard barrel nut like the Centurion C4 and a one piece version with a bomb proof barrel nut lock up.
The Troy Delta Battle Rail Mid sort of fits the bill but the mounting method leaves a lot to be desired.
https://www.primaryarms.com/Troy_Del...lt-mxbt-00.htm
Anybody else or is this too old school? Even markm is running rail mounted sight
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