I have had nothing but great experiences with C Products Newington Mags. My brother and I just managed to snag a couple of the new C Products Defense Florida Mags from Midway backorder. These were 30's. I have not taken mine out but of the two he bought, the spring was so bad in one of them that it would only feed the first 20 rounds. When he went to check for burrs and replace the spring, two of the floorplate tabs snapped off, making it a $20 piece of scrap. Anyone have similar experiences with the new C Products mags?