I love these mags. I run them at around 30 RPS, and they feed flawlessly! Even though they're a little hard to get into your magwell at first (common with most metal mags), you have to just insert and remove the mag a few times, and then you should be good to go. Another thing that I love about them is the pull cord feature. It's way more convenient than regular winding wheel mags. Overall, these mags are great, and id recommend them to anyone that runs M4 magazines.

Best Mags I have ever used for Highcaps. Feel and Built solid. No more winding. simple and quick to use. Worth every penny Buy them