Those floor plates have to go.
It sounds like they take existing USGI mags, insert their own followers and floor plates.
"These magazines are the most reliable ever manufactured" per D&L. That's quite a claim.
How do you clean the magazines ?
Removing the baseplate by using a screwdriver kills the idea of routine cleaning, and those that have a screwdriver wills trip out that insert making sure that they are staying tight.
I can remember doing mounted and foot patrols in the desert and having to clean everything, including mags to clean the fine powdery sand out. The screws have got to go.