And they are guaranteed by CProducts for any manufacturer defects... did you contact us and arrange for replacement?
Send me an email (not PM) with details of the issues and a copy of the original invoice... we'll make arrangements to get the manufacturer's warranty for you.
With respect to "oversize" we will need to verify it's the magazine and not some other issue. In some cases the issue is in fact the installation of a different floorplate (Tacpul for example) and this causes the magazine to be spread a bit wider at the base and ends up causing drop free issues. You can confirm if this is the issue by trying the magazines with the standard floorplate. Also seen where the spring was installed wrong and this caused similar problems.
If the magazine itself is out of spec (and we have seen this on a few units), once verified, that would be a warranty replacement too... but if you didn't contact us (or CProducts) then how are we to know that you're having a problem?
CProducts is very good about their magazines... no need for anyone to suffer with defective product.
Mark