That's what I figured, thanks.
In regards to the Red Snake DBM, I think they would have been the only option on the market for a direct drop-in fit for standard Tikka inlet with AICS magazines, right? The CDI and Atlasworxs metals claim they still need inletting with a factory Tikka stock to use their DBMs. That's why I'm confused Red Snake didn't use standard AICS as their DBM requires no modification to work and they could/would of pulled a lot of business from CDI and Atlasworxs for those who wanted to run AICS mags they already had. Maybe requiring no inletting work is hy they HAD to use the different AI mags, I don't know. I'm more curious than anything on the choice to use the AE mags no one has.
ETA: I read a few pages back where Red Snake explained that the factory bottom metal inlet is too narrow to run AICS magazines so that's why they had to go with the AE mags. Question answered!