As requested, a remixed design to allow a better fit with free floating tubes AND scaled up by 110% to allow Magpul M-Lok hardware to fit. Slightly more difficult to print though, but not impossible with the right slicer settings. I ended up using a raft and support and it turned out perfect.
Printer:
FLSUN i3 2017 Customized
Rafts:
Yes
Supports:
Yes
Resolution:
.3
Infill:
40%
Filament:
CC3D PLA+
Black
Notes:
If you don't like the curved cutout, just scale the original source STL 110% and that should work for Magpul M-Lok hardware fittings.
Remix Source:
https://www.thingiverse.com/thing:3527381
Category: Sport & Outdoors
The author remixed this model. Imported from Thingiverse.
Scaled up 110% and extruded cut to allow for Magpul M-Lok hardware for float tubes.