VZ61 Multipiece Lower, Release V1, Public Beta

 Yeah, I'm slow.  Truth be told, I have not edited this much since 2021, and have not tested it past 50 rounds.  In that time I had a lot of important stuff going on and kind of just forgot about it.  I am releasing this to the public as an open beta test.  I want to move on with other projects, but I will eventually finalize this.

Montage of old versions.

The only thing I did recently was make a PDF instruction manual and create a screw jig that has not been tested.  The VZ61 frame I tested in the video was a slightly older variant that actually stretched lengthwise (to the point where the upper would not close) and had noticeable egging of the screw holes, which I addressed by adding more material around the screw holes.

That being said, print at your own risk.  ONE DAY, I'll actually return to this project and finish it.

For more detailed build instructions, read the PDF included with the files.  Please feel free to post any questions, suggestions, or ideas in the comments section here.

THE LINK ON ODYSEE!!! CLICKY HERE!!!

More info from the included PDF:

Note: This package was made and released in August 2024. I am uploading a print file that I haven’t touched since 2021 and forgot about it because I had a bunch of stuff going on. Currently outside of the country until 2025. Trying to wrap everything up and release it now that I have a bunch of down time, and everything is based on notes and old pictures. Will update this documentation along with updates to the STLs in the next year.

INTRO: Yes, there's already a CZ61 / VZ61 Skorpion that takes an AR15 FCG (special thanks to FreeMenDon'tAsk's VZ61 which I used to compare/verify dimensions) but mine can be printed piece by piece at a time (for smaller printers) and replaced when worn out. Also I hate leaving my printer on for more than 12+ hours for large prints. You can inconspicuously print these pieces on school library or company printers and not arouse suspicion (tell them it’s Radio-Controlled Car parts). Additionally, my front pivot pin area is reinforced with metal so it doesn't need an ungainly thick pivot area. Some of individual printed pieces are simple enough that they can be replicated using metal bar stock and simple tools. The ultimate goal is to have a mostly metal (if not all) receiver.

Future Updates: There's still some minor fixes I need to do, like add more material around the screws so they don't crack. Maybe make the front and rear side plates one piece. I also want to make a semi-auto VZ61 FCG version since I now have several sets of these trigger groups that need a home. Also maybe Walther PPS Mag-well since I have a bunch of these magazines.

The final phase for this is to create a set of jigs so that you could re-create the 3d printed parts out of metal stock - at least for the side plates. The front, center and rear trunnion would always be 3d printed due to their complexity, but I want to try casting them from aluminum, brass or zinc some day. I haven't got that far yet because I got bored of this project so I'm trying to push the files to the public for testing.

Old footage:

VZ61 Proof of Concept, status update

Video of my own version of the VZ61 “SkARpion” receiver - so called because its a Skorpion with an AR fire control group.  Yeah, its been done before, but I like mine better because its metal reinforced, user-assembled, and will include modular magwells, grip assemblies, and FCG containers.  It isn’t dead and I havent forgotten about it.  It needs a few tweeks before I am ready to release it to the public, hopefully by Christmas.

skARpion vz61 - partitioned prototype - part 2

Finished basic partitioning of VZ61.  Ugly, but there it is.  There are four connecting sidewalls (one on each side, purple, red and teal pieces in the pictures below) which can be printed flat without supports.  The rear buffer (yellow) can be printed on its backside without supports.  I think the front piece can be printed without supports.  Middle piece (green) is complex and definitely needs support and should be printed upright.  The grip piece (blue) should slide in upward and will be pinned in place.

skorpar15_partioned_v0_90c

Untested; not ready for distribution just yet.  Soon, though (this year, sometime).

To do:

• Round out the rear connecting walls a little bit to be aesthetic and add material around screw holes
• Make the rear connecting wall follow the angled contour of the middle piece and mag well area.
• Triggergaurd - a single 3d printable one or an AR15 triggergaurd adapter
• Add pin holes on grip mount
• Add an optional buffer tube adapter
• Alternative versions for an AK grip or my custom MG42-styled grip.

Top view

Part one

WIP: AR + vz61 Skorpion hybrid - "The SkARpion" - part 1

Work in progress for a 3d printable VZ-61 that uses an AR15 FCG and is printed in small sections.  "SkARpion?"  Pretty terrible name, I know.  This design is based on FreeMenDontAsk's design which you can find on DefCad.  It used to be available on GrabCad but I guess it got deleted by moderators.

Initial partitioning.

I personally hate 20+ hour long prints and want to print the pieces in smaller, easier to manage sections.  This way I can tune the receiver to my printer/filament and not have to re-print the entire thing if something is screwy.  Also people with small print beds would hopefully appreciate this.

The front and back pieces should not require any supports.  The middle one will probably need support on the bottom.  The slightly clear green wall is one of the connector pieces that will have holes that will screw all the way through to the other side of the receiver.

Not really high on my list of priorities, but I wanted to show a proof of concept.

Progress report: Magazine walls done.  Walls should not need supports.