Walther patents anti-disassembly mechanism

Carl Walther GmbH has filed for a patent on a mechanism which prevents a pistol being disassembled if a round is chambered. It works by using the extractor to manipulate a pin which prevents the disassembly.

Diagram from the patent.

Personally, I think all gadgets like this are unnecessary. Police departments, on the other hand, love these kind of features. That the Glock requires its trigger to be pulled on disassembly has often been cited as a reason police have switched away from the Glock in favor of its competitors.

The patent application can be viewed online at Scribd.com.

Steve Johnson

Founder and Dictator-In-Chief of TFB. A passionate gun owner, a shooting enthusiast and totally tacti-uncool. Favorite first date location: any gun range. Steve can be contacted here.


  • Pointless. It’s a mechanism for the incompetent.

  • KP

    someone who doesn’t check the chamber before cleaning, or before HANDLING, is so stupid I’d rather they shoot themselves than someone else.

  • Tom

    Given the number of people who shoot themselves while cleaning their guns every year, the Glock argument might not be such a bad one.

  • laurent

    I think Sig are better than Glock on one point : the idiot-proof disassembly. Since you have to open the chamber before being able to get the lever down, you can’t fail.

  • War Wolf

    My EDC pistol is a Walther PPS and it has the removable backstrap that renders the pistol inoperable once removed. I love the pistol because it carries so well but I have often worried that if it were ever dropped in a stressful situation it may break off and leave me with nothing more than a heavy object to throw at the bad guy.

  • Freiheit

    laurent – Is that by design or coincidence? The 1911 is similar, you have to get the chamber about half open to get the slide release out.

    I agree that extra ‘safety’ features on guns are useless and dangerous. You rely on yourself and the 4 rules and NEVER replace those with mechanical devices.

  • Don

    I have a gadget which prevents the disassembly of any pistol with a round chambered. I call it an “eye”. You can use it for aiming too. Very multi-functional.


  • Forrest Taft

    Don’t drop it! Train so that holding on to your defensive tool, whatever it may be, does not leave your person. BTW, the PPS is a fine defensive tool and a solid platform, plus very accurate.

  • This will lead to someone being shot. You CAN’T idiot-proof something designed to kill people, sorry.


    “Mechanical safety devices breed complacency”

  • guy

    Extractor mechanisms can already be a huge source of feed problems. Making them even more complicated sounds like a really bad idea.

  • nwhobbies

    So, you don’t know how to disassemble a Glock WITHOUT pulling the trigger? I’ve been doing it for years.

    Ask me via email and I’ll explain.

    Earl G. Nash
    2 Nashes, LLC
    LWD Certified Armorer for Glock Pistols

  • Matt Groom

    Now, if only they could invent a mechanism that prevents people with low IQs from firing the gun, we’d end nearly all gun crime on Earth.

    “I iz a GANGSTA, yo! Give us dem’ greenz!”
    “Uhh, no.”
    “Looks like your gun doesn’t work. You must be an idiot.”

    Plus, you’d stop all the mass murders. Nobody ever looks at someone like Cho Seung Hui or Nidal Malik Hasan and says “Whatever his motivations, he must have been very, very smart.”

  • This is nothing more than the other side of the old saying:

    “If you make something idiot-proof, they’ll come up with better idiots”.

    KP and Ermac nailed this one. My one and only AD was due to not checking the chamber. I then adopted the habit of putting my finger in the chamber AFTER I looked into it, and wiping my finger across the breach face, and haven’t had one since.

    Wiping the breech face doesn’t do anything to clear the weapon, other than force me to look at the breach. My AD was caused by a faulty extractor hanging onto the round (I’d held my weapon out, dropped mag, racked slide and observed chamber at arm’s length, then slingshotted the weapon, pulled the trig…BANG!)

    Complacency breeds sloppiness. Sloppiness breeds accidents. I had thought I was being OCD and silly when checking weapons 3 times before considering them safe. Now I’ve gone the other way- as above, I am effectively checking the weapon 3 times (“chamber clear, breech clear, magwell clear, weapon is clear” is what I say as I do it), with a reinforcer of physically touching each component so I don’t get sloppy with the Mark-1 eyeball. It’s not unusual to see me repeat the whole damn thing 3 times in a row before I’ll hand a weapon over to someone, either. I’m to the point if I clear the weapon, know there’s no ammo for it in the house/building, and turn around and pick the weapon back up, I’ll do it all over again.

    I taught my son the same thing. He’s 9 and I trust him FAR more with a weapon in his hand than I do most adults.

    Train ’em right, train ’em often, and train ’em young.

  • Tom Stone

    I follow the same procedure Jafo does due to good training.The Santa Rosa Ca PD got rid of their Glocks a few years ago because of numerous negligent discharges.I am REAL careful whenever I am near one of their cops because it speaks very loudly to me about the quality of their training.

  • Simon_the_Brit

    Another solution to a problem that doesn’t really exist.

  • R.A.W.

    So you’re telling me that if a little piece of case rim shreds off and gets stuck, and clogs up the underside of the extractor, it’ll be impossible to pull the pistol apart to fix the problem?

    Err, yeah. Great idea.

    • R.A.W., my thoughts exactly.

  • Carl

    I remove the magazine, then rack the slide a couple of times, then make sure the chamber is empty, then ride the slide home until it’s almost closed, then again check that there is no brass in the chamber (with the slide almost in battery). Then I aim and fire in a safe direction (half expecting it to go bang).

    Safety mechanisms should make sure that the firearm won’t discharge on it’s own when carried or handled or possibly struck or dropped. They should not replace the brain of the operator.

  • Ken

    Matt…lol low IQ…true.