Are some of these key-retaining? (The website says that they are, but the one that I received is NOT key-retaining. The keys can be removed in the unlocked position, and the lock can be locked without any key.)

"...When not in use, the keys to the Magazine Lock cannot be removed unless the unit is in the locked position..."

<http://selectshootingsupplies.com/collections/security-locks/products/ar-15-firearm-lock>