I have a DD MFR tube. I have no use for a bottom rail. I got sucked in by the sexiness of the Fortis rail, but it hasn't done anything for me that my very basic tube is already doing. I prefer just adding little rail sections where I need them. I also prefer the dozen possible places I could mount a sling swivel on a tube like the MFR or NSR.
Lockup on the NSR and even the MFR is pretty bomb proof. It looks like the Fortis is as well. Time will tell.
The money was not wasted for us. My son has it on his carbine as of today with a new upper we built. He really likes it, but he also doesn't have much time behind an AR to really develop a feel for what he needs.


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