Marine Cpl
.577 Tyrannosaur.
Yes it does. All you have to do is remove the magazine by whatever means the lock allows you to do so and it'll accept another one.It still has an ability to accept a magazine. It does not with a lock installed.
Under that logic, you can just keep a magazine in the rifle at all times with a standard magazine release and it won't accept another one.
The method of magazine removal is not in the law like it is in California's law. If it can be removed, it can accept another one.