C Products Defense 6.5 Magazines

[SDW]

All of mine had to have the trap door side feed lip tweaked for proper feeding after that they have room perfectly.

"trap door side"?? Do you mean the ejection side, i.e. the right-side feed lip? I would be interested to know what you did exactly. I have three C-Prod Grendel mags. All 10-rounders. I have only used one so far. Seemed like it didn't always pick up and chamber a round. Granted, the Upper and the magazine were brand new at the time.

I don't plan to blaze ahead with modding my magazines without testing them thoroughly first. But I the issue occurs with any of them I would like to know a possible remedy.

Thanks.