https://lingleindustries.com/stribog-scorpion-lower/
As mentioned above - Juice isn't worth the squeeze when you add it all up for using Scorpion mags unless you really like the platform. Scrpion is best value for reliability and aftermarket support + cheap reliable mags.
also just so everyone knows.
Most of the issues on bogs come down to the mags.
The gen 1 mags suck, i have some that run ok and alot of folks dont have issues, but they still suck
the gen 2 mags have steel lips on them for better reliability. These are hard to find and expensive and you still shouldnt buy them
the gen 3 mags are supposedly on the way
the gen 4 mags are supposedly in development and are rumored to be curved mags.
basically what this boils down to, is if i were a bog owner, i wouldnt buy ANY of these right now. I would be waiting for the newer planned mags to come out so there is no need to change out hte lower unless you want to use standard AR15 grips and triggers, i also wouldnt buy any new mags until the newest ones hit the shores.