Came across this company during an Internet search:

https://www.thril.com/gear/ar-mag/

They seem to be somewhat of a newcomer to the AR market. Pandemic notwithstanding, the market seems to be awash in polymer mags from multiple brands. I guess it's always a good thing to have a new firearms accessory company on the block, but don't you run the risk of your product (mags, in this case) getting lost in the crowd?