Its there for the stupid people.
The real problem is that there are some guns with 'magazine disconnect' and some guns without 'magazine disconnect". This does lead to confusion, because some people will believe that all guns have a magazine disconnect or are empty when the magazine gets dropped.
Those of us that have some knowledge of gun safety tend to be smart enough to drop the magazine and rack the slide to unload the round in the pipe hate the magazine disconnect. Why? Well because of tactical reload. But many novice gun owners that keep a gun in the house have no idea of what a tactical reload is. To us that have some knowledge, of a tactical reload (not that I will ever have the need to use a tactical reload simply because I have no intention of getting into a prolong gun fight) know it could save your life if you know you are running out of ammo in the magazine... because that second or two that you drop the magazine, you can still fire your gun, plus you may not have to rack the slide to keep shooting. But if you are in a gun fight, run out of ammo, and your gun goes click, or the slide locks back, you will be vulnerable to your assailant who could use that opportunity to gun you down. The tactical reloads allows you to refresh your magazine when it a good time for you, not your assailant.
BUT... and its a big BUT... the magazine disconnect is there for the gun ignorant people that have little knowledge of how semi-autos work. Case in point, we had a dumb step-mother here a few months ago that thought it was funny to play with a gun with her step son and his friend that came over for dinner. She pulled out a Glock... removed the magazine and started to point the gun at the kids, and at the family dog. The kids got nervous, one ran out of the house. She laughed, said it was empty because she removed the magazine, and nothing would happen but continued her game of pointing the gun at her step son. She pulled the trigger killing him. That my friends is why some manufacturers put magazine disconnects in guns! For the ignorant morons out there have never be properly educated.
A woman is facing a manslaughter charge in connection with last month’s fatal shooting of her 15-year-old stepson in Pembroke Pines. Francy Marcos, 24, is facing a charge of manslaughter with a firearm in the June 11 shooting, Pembroke Pines Police officials said Tuesday. The shooting happened...
www.nbcmiami.com
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I have a couple of guns with magazine disconnects... the one that comes to mind is the first generation Ruger LC9. The first ones came out with thumb safeties, DAO hammer action and the dreaded magazine disconnect. I remember the backlash that Ruger received... the second generation (I got one of those as well) was striker action, no thumb safety, no magazine disconnect.
The problem as I see it... it leads novice gun owners to confusion because if they learn to use a gun with the mag disconnect, they might get the wrong idea that all semi-autos operate the same way.
Anyhow, that is my 2 cents on the topic. But its there for a reason.