Don't trust the bad reviews - Taran Tactical Innovations Base Pad for AR-15 PMAG 30/40 Magazine

Not sure what these other reviewers are talking about when they say "it's too light" for them. That makes no sense to me. You are replacing a piece of plastic with a heavier piece of metal. It's not rocket science. It's plenty heavy enough and I love these things. They make my 5.56 mags easily distinguishable from my .300 mags. Installation was super quick and easy. Just make sure you have the push pin all the way out before sliding it on. Otherwise, it won't slide on all the way.