I have ten of these Magazines and have never had a problem with any of them. I also own six Magpul P-Mag's of different types. Including two of the original design, two of the new design, and two of the new design with the Mag-level window. I like the look of the P-Mags better but as far as functionality is concerned these Bushmaster 30rd's are hard to beat. Plus alot of your double mag pouches won't accept two P-Mags, and if they do it's REALLY tight. Making quick reloads near impossible. Do yourself a favor, stay above the marketing and get something that works well in your SYSTEM. I don't regret buying my P-Mags, I just wouldn't reach for them first.