On April 28, 2021, Cody Wilson and Defense Distributed announced the release of a new version of DEFCAD. The key technical distinction of the 2021 repository included:
As of late 2022 and 2023, the is largely considered a "time capsule." Many of the original links are dead. The new DefCAD (defcad.com as of 2024) is a highly curated, legally compliant library that charges steep fees.
To comply with state-level restrictions and federal export laws, DEFCAD transformed from a free, open-source library into a closed, U.S.-only subscription repository requiring strict identity verification. The Significance of 2021 for DEFCAD defcad files repository 2021
The crown jewel of the 2021 collection was the WarPig . Unlike previous lowers that cracked after 100 rounds, the WarPig utilized reinforced geometry for use with carbon-fiber Nylon (e.g., Polymaker PolyLite). The repository included step-by-step heat-insertion guides for metal threads.
In 2021, the repository, managed by Defense Distributed , continued to operate as a centralized hub for 3D-printable firearm files, following its significant relaunch in 2020. During this period, the platform transitioned into a paid membership model On April 28, 2021, Cody Wilson and Defense
The open-access euphoria of April was not to last. As the article "GunCAD and Value: Survivor Therapy" on the DEFCAD blog details, by June 1, 2021, the site had retreated behind a paywall. The free-for-all of the spring was over, replaced by a subscription model. The shift was influenced by the aforementioned BIS letter and the continuing regulatory pressure. While a DEFCAD FAQ stated that a "subscription affords unlimited access to free and licensed files," the implementation of a paid membership system marked a significant change from the idealistic free distribution that had characterized the April release.
argued was necessary to ensure ITAR (International Traffic in Arms Regulations) compliance by verifying user identities and locations. Open Source Philosophy To comply with state-level restrictions and federal export
: The repository's activities were a focal point for state-level bans on "ghost guns," leading to the implementation of the aforementioned geo-fencing and identity verification tools. Justia Law 4. Technical Trends Observed Keybase Is Banning 3D-Printed Gun Groups From Its Service
Years of federal lawsuits followed. Defense Distributed argued that hosting CAD files was a protected form of free speech under the First Amendment.