KS ARG released another series of parts for the MDR/MDRx/WLVRN design for anyone interested.

Magwell Flair:
https://www.thingiverse.com/thing:6600190

https://imgur.com/a/FyQ2qnO

This one adds a larger flair on the magwell as well as resolves the lack of a flair when using the 5.56/300blk magwell insert, primarily for the go fast competition people who are doing shouldered reloads.  Works for the MDR/MDRx/WLVRN.  

New FE to SE Side Plate V5
https://www.thingiverse.com/thing:6600206
See the image below for details, This design removes the rear tail, improves the strength of the forward claw, improves the strength of the rear slider, uses a smaller and lighter spring for ease of install, Updated Spring Guide, Increased strength Switch, and improved dust cover retainer.  There is also a blank plate option for those who wanted to be able to change SE panels without a screw driver.

Old v4 images for comparison
https://imgur.com/a/byXnXiL

Brass Catcher for V5 Plate
https://www.thingiverse.com/thing:6600211

https://imgur.com/a/oV4gmL0

This one is a bolt on attachment to the new FE to SE Side plates

Thats kinda neat

Indeed!  The KS ARG team did a great job with the improvements.  Definitely gives some more options, on the cheap!