Here at DEFCAD we spend most of our attention on the latest printable project file drops, but developers need a significant amount of other data in order to produce those files in the first place.
Most of this technical data is found by reverse engineering parts and components into CAD models on a case
by case basis. However, with thousands of files there are quite a few that exist purely
to serve as references for developers in fashioning their own unique designs. This week
has itself been full of uploaders providing these types of files.
Starting off, Jacmnb
provides us with an AR-9 Bolt Carrier Group. There are more
than a couple AR-9 parts kits on the market, yet what is most important for a 3D2A designer is usually good exterior dimensions so that 3D printed upper receivers can be properly matched. If one's
print settings were dialed in enough, it's not inconceivable to even print a fitment prototype of these files.
Following those BCG models, there has been another update to the AR-15 lower receiver by
SupremeTrickster coming both in 80% and 100% variants. This
design adheres to military
specifications (milspec), but its been adjusted for ease of manufacturing by
removing some of the more onerous toolpaths and small radii. Obviously this design is
not meant for 3D printing due to how little material is provided where the stock and upper
receiver connect, but in the current legal environment its great to see people making designs
that further cut down on the limits on mass manufacturing and machining these kinds of lowers. We'll note this exact model is even
compatible with Ghost Gunner 80% Jigs!
Finally, we wrap things up with SwarmTech's Metric Hardware Card. This project not only
offers the ability to physically check certain sizes of hardware, but it also includes
skteches with the proper dimensions so that you don't have to go to McMaster-Carr
or Traceparts to get your reference models all the time. Having standard hardware is an
essential part of a developer's job if they want other folks to actually make or contriute to their
projects, and this is a great step in the direction of building fully featured tool boxes
to help make such standardization as easy as possible! Feel free to explore DEFCAD's
reference section and be on the look out for more of these
useful tools for your own future projects and
G0̷ Build Kit
This week’s sponsor is Ghost Guns.
Providing the best in unserialized parts kits and
tools to build your own ghost gun today! The new standard for chassis based pistols was
achieved this year by Defense Distributed with the G0̷: A fully 0% Pistol for Gen3
G17/G19. Ghost Guns provides the both the full Build
Kit with Grip Module and the
necessary tooling in for the Ghost Gunner with the Starter
DEFCAD hosts all the necessary cutcode for the Ghost Gunner to manufacture the chassis
as well as somedesignsfor remixing your grip module. The Future is 0̷.
Last month a cringing Roberts Court blinked under protest and preserved the Biden frame
and receiver rule for the life of the first appeal from a final judgment of the Texas
district court. That appeal isn't exactly going well for ATF, as you can hear
below, but Roberts is still giving the agency the next two years to have their rule.
This month, judge O'Connor strikes back with forty two pages of just why he has the
authority to issue an injunction against the frame and receiver rule, as to at least two
VanDerStok plaintiffs: Defense
Distributed and 80 Percent Arms.
The DOJ will probably appeal, but the Biden administration is now in the worst place they could be: The
true believer fanatics in this industry have achieved commercial monopoly.
In line with this week's focus on reference models, DEFCAD wishes to give a little love
to a rarely discussed element of DIY Defense: Spring Manufacture! Firearms rely heavily
on regular points of force being constantly applied to certain parts of a design in
order for things like triggers, magazines, bolt carrier groups, etc, and springs
remain one of the simplest and cheapest options for this purpose. While it is entirely
possible to purchase most springs one would need for a gun build, as they are one of the staples of any
industrialized economy, there are times when prototyping that making our own springs becomes desirable. And DEFCAD is here for
The first pair of items we'll highlight are HW Enterprises'
SpringFactory and Armitage'sGlock Spring Bending Jig. The former is a series of printed and
that allows for very fine control over how an operator would process common
piano wire. Outside of the wire diameter (which can be adjusted for by modifying the
included STEP files) almost any other element you wwould need to bend your own magazine
springs is readily configurable. The glock mag spring bending jig does ostensibly the
same thing for common glock magazines but its simplicity of print and use is itself
The AR Style FCG Spring Bending Jig "Shuriken" by Forbel is a much
more recent release,
but we are confident it will soon become a DEFCAD Classic. With a Ghost Gunner
it is entirely feasible to manufacture almost every component of an AR-style fire
control group, but its not as easy to make the necessary springs. These projects
highlight the possibility of a future where builds like the FGC-9 MKII can be
manufactured almost entirely with a 3D printer, ECM setup, and a simple mill to help
open up the ability for those who want personal defense in regimes that don't allow any
trade of firearm-related components.
Defense Distributed has teased a new release of some kind for September 18th at "midnight." Is that midnight Eastern? Does that mean the morning of September 18th or the morning of the 19th? We wish someone over there would tell us so we could tell you!
While DEFCAD is known for being the best place for both accessing and visualizing the
most exciting remixes and speciality exterior designs, it has been a week or so since we've seen a major release. Void3Dprinting
comes in to break this
streak with his new round of suppressors just in time for fall.
These variants are embossed with a hexagonal cube styling which not only aides in grip but,
as you can well see, makes a truly excellent presentation. Per usual, Void makes sure
that a wide variety calibers are supported with his designs, which are as follows: 7.62,
.300 Blackout, .22 Rimfire, 9MM, .223, and .40. We are always
excited to see what Void
cooks up and his uploads this week do not disappoint.
DEFCAD has lately been making a concerted effort to distribute classic texts on
firearms design. Our past highlights have included
materials derived from military research, but now we turn our attention to civilian
works. James Virgil Howe, formerly in charge of the small-arms experimental division at
the United States Frankford Arsenal, wrote the two volumes of The Modern Gunsmith.
These texts do not focus on the engineering of firearms and their theory of operation,
but instead focus upon the intricacies of actually being able to manufacture and modify
said firearms. There is an incredible amount of detail present in this writing,
articulating not just how to interact with components but how to manufacture and use the
tools required to make the same. There is even a section in the second volume
about spring manufacture. While there is an insane amount of content spread across
hundreds of pages, we see very little fat and generous illustrations.
Since it was
published in 1941, it remains an essential inspiration for designers looking to
refine their experimental projects or to prepare them for commercial manufacture.