A post script to the addendum
I have found yet more news clips documenting the increasing proliferation of machinegun conversion devices.
On October 19th WBNS-10 out of Central Ohio put out a report saying that so far in 2023 Columbus police have recovered 53 Glock switches, compared to 17 in all of 2022.
On June 29th of this year WPRI-12 out of Rhode Island put out a report, while not stating any data regarding total seizures the report does detail starting at 1:15 of a man from Cranston who was busted with 18 Glock Switches and several AR conversion devices, several what I have dubbed "scam" sears (I say this because from my understanding their rigid metal construction does not allow them to actuate the disconnector thus making them essentially paperweights that carry a jail sentence) possibly one printed swift link and most interestingly of all, a Lightning Link.
Antimatter Industries, makers of the (In)Famous Scope Switch have teased their latest GAME CHANGING and REVOLUTIONARY Product developed in cooperation with Tactical Development, makers of the Proledge and other products
The Antimatter X Tactical Development Micro Wing has released, and it actually seems to somewhat do what it claims to do. MSRP is $120 which isn't absurd and it is fully compatible with Safariland duty holsters. There are models for both Surefire X-300B's (and only B's as the Wing mounting mechanism requires the crossbolt screw) and TLR-7 Sub's. One interesting design facet is that the Wing acts as a replacement mount, thus potentially skirting policies regarding gun modifications for those who carry them professionally.
google doc regarding gun compatibality
Guntuber Roger Barrera of QVO Tactical has put out a video featuring slowmo analysis of recoil (starting at 12:4

with and without the wing, a statement saying that with a compensated gun it is possible to over torque with the wing causing muzzle dip and a clarification that in order for a pistol equipped with a wing to holster in a Blackhawk T-Series you have to manually put the wing in a closed position as the holster does not have the geometry to cause the Wing to automatically fold up when reholstering.
CMMG has put out a video detailing new products for 2024
Nothing really notable, new trigger(contracted out to Rise Armament, new factory pin and weld options, new stocks, cerakoted pistol buffer tubes and an unstated additions to their DefCan suppressor line up (see next item for mount compatibility), New Muzzle brake that has the exterior dimensions of an A2 Birdcage to accept suppressors that use them as a mount
Some of you may have at one time either heard of or played a 2012 video game called Call of Duty: Black Ops II. Having been released at a time when several "future soldier" programs were still active and the future looked like everyone was going to be shooting polymer case telescoped rounds from the rifle underslung to their 20mm smart grenade launcher Black Ops II was the first iteration of the "Future COD" phenomenon and thus had some pretty unique and interesting armaments for players to endlessly slaughter each other with.
One of those guns was the "KAP-40", a non trademarked name for the TDI Kard, who is TDI and what is a Kard you ask? TDI standing for Transformational Defense Industries was a company that we now know today as Kriss USA, makers of the Super V recoil mitigation system utilizing Vector submachinegun. But back during those days of future soldiers TDI/Kriss had ambitions, they wanted to take their Super V system and put it in everything, shotguns, rifles both conventional and antimaterial and even handguns which is how the Kard comes into existence.
Now why did I write this whole ass blurb? Because I have found the patent for the Kard mechanism and it contains a whole lot more drawings than just the one featured in the above linked TFB article.
Lastly we have a new product from Cobalt Kinetics, collaborators with Goober Group and makers of abominations such as a an AR with two forward assists.
The Scrambler 5.56 suppressor. What is most notable is its physical characteristics, it is 4.75in long excluding the flash tines and, assuming this is not a fuck up,
6.2oz. while being "full auto rated" (there is no concrete definition as to what this means but I don't think they mean the SOCOM suppressor standard of 1440 rounds mixed semi and full auto fire) and having no barrel length restrictions with a 50,000 round service life (That's RC-2 territory and the RC-2 isn't made out of Titanium).
Now you may be thinking to yourself, what the fuck, that's impossible, I agree with that sentiment but hell crazier things have happened.