Beach Pigeon and Optic Cut Library
November 18, 2023
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New Releases Beach Pigeon, DMB Glock Mags, and A Silly Phone Stand 
DEFCAD is back at it with plenty of releases this week. The most talked about release has been The Beach Pigeon (22lr Desert Eagle) by eZaF. This project ocombines an economy of materials (for a reliable 22LR build) with a respect for the classic Desert Eagle platform, and is incredibly simple to print and put together. eZaF has made a public statement with this release, and we believe it meets a high standard. Following the Pigeon we have DannyMeatball's release of his eminently practical Glock Small Frame Magazine Package. Most likely inspired by PSR’s discussion on 3DP for EDC with a DD43X Review, this is a great contribution by one of our most valued partners. It even offers printable magazines for the G42, G43, and G43X platforms. Download these and a DD43.1 Printable Frame today to ghost out your Every Day Carry. Finally, we've been treated to A Silly Phone Stand from Laffs Dynamics. Yes, Mom, it's just a phone stand with a funny shape. But you may want to print it in a DEFCAD-recommended Nylon if you want it to survive heavy, repeated phone usage. Sponsor Optic Cut Library 
“Because gunsmithing was a universal need in early America, many early Americans who were professionals in other occupations engaged in gunsmithing as an additional occupation or hobby.” -Joseph G.S. Greenlee, The American Tradition of Self-Made Arms Defense Distributed and Ghost Gunner present: The Optic Cut Library. This gunsmithing CNC library covers the Docter, RMR, RMSc, and MOS footprints and was designed with M1911, P320, and various full size and compact Glock© slides in mind. The OCL is included in a free update for the Ghost Gunner 3-S. Home gunsmithing at its finest. Be sure to pick up an Optic Cut Kit if you don’t already have the necessary clamps and parallels for your Ghost Gunner. This is just the start of a whole new chapter in home gunsmithing. News ATF Attack on 80-Percents and Braces 
Regarding our mutual fights against the ATF, we can report more good news. First, on November 9th, the United States Court of Appeals for the Fifth Circuit in VanDerStok v. Garland ruled that the Biden frame and receiver rule was obviously unconstitiuonal under the GCA, remanding the case to the district court in Fort Worth. It turns out ATF can't just explode the statutory definition of a firearm. Who knew? Where an executive agency engages in what is, for all intents and purposes, “law-making,” the legislature is deprived of its primary function under our Constitution, and our citizens are robbed of their right to fair representation in government. -Kurt D. Engelhardt, Circuit Judge FPC, Defense Distributed, The Second Amendment Foundation, and 80 Percent Arms have been doing all they can to defend your rights in this case, and we will see the fight that the Biden Administration has started all the way to its bitter end. Our second legal update concerns the ATF’s assault on stabilizing braces and comes from the Amarillo Division of the Northern District of Texas. Here again the Biden Administration has been caught illegaly attempting to redefine established law in order to categorize millions of devices as taxable SBR's. In Britto v ATF, the court found that since the Brace rule is not a logical outgrowth of the Administrative Procedures Act, it is most likely illegal. The government cannot use "the public interest" to defend an unlawful rule. While these rulings are good news, we have to be wary of the final judgments of the Supreme Court, which are surely to come. Keep following DEFCAD for updates in these battles, and keep up the good fight with DIY defense. Glossary Heavy Machine Gun 
Light Machine Guns like the M249 SAW, IWI Negev, and the RPK are often thought of when we contemplate the need for heavy firepower. Certainly not without bark, LMGs can lack bite, and fortunately, the term implies something even greater: the Heavy Machine Gun. HMGs are distinct from LMGs for two reasons, the first being weight, and the second being caliber. By either standard, they fill a niche that’s not quite LMG and not quite autocannon, lending themselves to a unique tactical role. Traditionally, the classification for HMGs emphasized the weight of the gun, with weapons like the M1917 Browning Machine Gun and the famed Maxim Gun being far too cumbersome for infantry to carry around and use in roles that would call for a Squad Automatic Weapon. These were far more suited to positional defense, like the No Man’s Lands of WW1 they found themselves overseeing. It is also worth noting, that unlike the modern definition, HMGs historically were not distinct by caliber. Many were chambered in conventional full-power cartridges, such as .303 British and 7.92x57m Mauser. Today, however, HMGs are classified as such by caliber. Anything below 10mm doesn’t make the cut, and anything above 15mm approaches autocannon status. Though we say this definition is modern, the distinction actually comes from a late-WW1 German weapon called the MG18 TuF, which was chambered in the exceedingly mean 13.2x92mmSR anti-tank and anti-aircraft round. One HMG of the era that’s still in use today is the M2 Browning, chambered in good ol’ .50 BMG. More than enough to blow away any cover an enemy is hiding behind. This is a part of a DEFCAD series on various technical terms regarding the what, how, and why of firearms. Firearm Depicted is the Browning M1919, the smaller, but older brother of the M2 Browning. Video Magnetically-Delayed Blowback 
This video describes a set of experiments that Our Own Devices devised years ago when testing the feasibility of Magnetically-Delayed Blowback. There have been implementations of magnets in guncad with projects like the RTT-9 and the roller-delayed blowback of the RBC-9 project, but this particular approach has not yet been played around with. The introductions to a variety of basic firearms internal mechanism functions in this video are fairly straightforward and illustrative, and are almost more valuable than the experiment itself. The comparison of modifying a 10/22 rifle and developing a pure prototype for the magnetic force seems like a great way of exploring new design possibilities, especially for checking feasibility. DEFCAD Dump Other Recent Releases 
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