this is a digital download not a physical product
this is a molle compatible gl0ck magazine holster
mags will have a fair amount of retention the front panel is free floating so it has the ability to flex enough for the mags to not get totally stuck but still holds them tight.
if it feels to loose scale it down a percent or 3 to tight scale it up
stock mags fit great as is menendez mags may be a little loose
print slow and hot for max strength
id suggest abs if you have an enclosure or htpla should be fine print with the best material you are familiar with.
no supports needed