You know, the Fraudulent Joe
☭Biden
* people -- and their fellow travelers -- seem to have no clue as to how simple firearm technology is, and how easily someone with a basic set of tools (not a milling machine, nor a lathe), and basic skills can build a working firearm. One thing they definitely don't seem to realize is that a semiauto in a relatively low-pressure pistol cartridge is about the easiest thing to make, because lockup consists of a bolt/carrier of sufficient weight, with the recoil spring -- and maybe a hammer spring -- adding a little bit to the lockup, though the bolt weight is the overwheming factor.
Here's more than you ever wanted to know:
Volume IV of The Machine Gun, by George M. Chinn, USMCR. The first section takes you through blowback actions in great detail. The whole set is available at archive.org. Download today! You never know when the Marxists will start purging Archive, Amazon, and even public libraries and local bookstores.
I'm not kidding.You wanna build 0% AR lowers? It isn't that hard. People have built AR lowers out of wood, machined plastic, 3D-printed plastic, bolted-together aluminum, and even welded sheet steel.
I've been toying with the AKM model: bend sheet metal into a "trough," like an AKM receiver. The front trunnion contains the pivot pin lugs, and the rear trunnion (of aluminum) has an opening for the takedown pin lug from the upper, as well as accepting the buffer tube. This can be threaded or can just be a hole with set screws around its circumference, that gently engage the threaded part of a buffer tube. Look at guns like the PPS-43 for a sheet metal magwell and mag catch. I suggest an AK pistol grip, as they're easier to attach than an AR grip.
The hard part is the bolt hold open catch, but that can be omitted. No detents anywhere: a cotter pin or similar arrangement for the takedown and pivot pins, and magnets on the side of the receiver form the stops for the safety/selector lever, as long as it's steel. You should use an ambi lever, as there's no detent to hold the safety in place. Non-walking pins are suggested for the hammer and trigger, as the thin lower walls don't offer the friction of a thicker aluminum receiver.
I'm certain it's doable, but I'm currently in a 0% AKM blowback pistol build, using 19 gauge (1mm) stainless as my receiver. I plan to chamber it in .32 ACP, with a Walther PP barrel I have, along with an AR fire control group. Think something like a Czech vz.61 Skorpion, but in semiauto, without the complicated bolt velocity reducer mechanism, and with a pistol buffer tube to contain the recoil system, and for "cheeking." Don't know for sure if it will work on the first iteration, but the path is often more rewarding than the destination!
Oh, and by the way, I take the quote below seriously. I believe that one of the ways we move homebuilt arms into "common usage" is by sharing the information with others. Ideas are like viruses: they spread from person to person.
Now let's go forth and make stuff!
* Not actually elected