due to the shape of the 416 mag well, Magpul Pmags dont fit all the way in. the front inside edge of the mag well needs to be filed down to fit the Pmags. i run Magpul PTS Pmags on my VFC416 and i had to file the mag well befor the mags would fit.
if you need to see exactly where to file i can post a picture.
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Weapons Technician / Gunsmith
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