I like them too. A single position to remember. A couple reviews in which a thousand rounds were being shot shown which the 20 shot magazine leads to loads of jams. The normal magazine is okay. Message to any innovators. There’s a real market for a great 20 shot magazine https://ithaca-deer-slayer08405.thezenweb.com/9mm-carbine-things-to-know-before-you-buy-78116412