I just got in another 6 of the standard black PSA mags and I tried 6 of the new PSA brown translucent mags. In both of my Scorpions , as is, they would fit and lock the bolt back, but they were very snug, tight actually, in the mag wells. My pistol with carbine forend has a slightly looser magwell and my Micro 's magwell is just a hair tighter. It took a couple minutes per mag working on a Harbor Freight 1 inch belt sander to get the front pad sanded down to get where they inserted and came out of the magwells easily. I tested each mag as I worked a little bit at a time off the front pad. Make sure you test the fit with the bolt forward, test the mags ability to lock the bolt back and it's fit in the magwell with the gun at bolt lock and test it's fit with the charging handle locked back, you will get 3 distinctly different feels for the mags fit in the magwell in each mode. I didn't worry about sanding anywhere else on the mag to try and get them to drop free from "bolt lock" as I am used to having to strip mags out from using an HK MP5 for 20+ years.
