The .22 LR RUGER MkIV pistols got in trouble. RUGER has announced a major safety recall that applies to every Mk IV produced before June 1, 2017. Here's what they say on their website:
“Ruger recently discovered that all Mark IV pistols (including 22/45 models) manufactured prior to June 1, 2017 have the potential to discharge unintentionally if the safety is not utilized correctly. In particular, if the trigger is pulled while the safety lever is midway between the “safe” and “fire” positions (that is, the safety is not fully engaged or fully disengaged), then the pistol may not fire when the trigger is pulled. Although only a small percentage of pistols appear to be affected and we are not aware of any injuries, Ruger is firmly committed to safety and would like to retrofit all potentially affected pistols with an updated safety mechanism. Until your Mark IV pistol has been retrofitted or you verify that it is not subject to the recall, we strongly recommend that you not use your pistol.”
Safety recall RUGER Mark IV: models affected
These models bear serial numbers beginning with "401" (2017 models) or "WBR" (2016 models). Newly manufactured Mark IV™ pistols beginning with serial number "500" are not subject to recall. No Mark IIs or Mark IIIs are affected by this recall, only Mark IV pistols, including 22/45 pistols.
Mark IV and 22/45 pistols already retrofitted with the updated safety mechanism are easily identified by the letter "S" in the white safety dot that is visible when the safety is engaged.
Safety recall RUGER Mark IV: what to do if you have one of the pistols affected?
If you have one of the pistols subject ro recall Ruger suggests not to shoot the gun. You can register for the recall online (https://ruger.com/dataProcess/markIVRecall/) and they will send you a prepaid USPS flat rate box. You must send the lower only to Ruger via USPS and they will install an updated sear and safety, turning the pistol around in a week, with the addition of a free magazine.
If you live outside the United States, you can enter your serial number in the online form to determine if your pistol is subject to the recall. If it is, you will be given the opportunity to enter your name, address, phone number, and e-mail address and verify the serial number of your pistol.
Ruger plans to have all international pistols retrofitted at repair centers in the customer's country. Because of international licensing requirements, there will be a delay before parts are available for your local repair center to perform the retrofit. Ruger will contact you when parts are available in your country and provide you with contact information for your local repair center so that you may make arrangements to have your pistol retrofitted. Ruger will send complete lowers of the pistols to the repair centers. So they don’t change just the affected parts of the MK IV but the complete lower with a brand new one. Ruger recommends that you do not use your Mark IV pistol while you wait to have the retrofit performed.
In case there are any aftermarket parts installed in the gun, Ruger says to simply take them out before sending in the lower.