Open Source Defense
Substacknewsletter · by Open Source Defense · English
100% gun rights, 0% culture war. Making people proud to care about gun rights.
- Audience
- 7K subscribers
- Shown publicly on Substack
- Observed frequency
- Every two weeks
- From 6 posts indexed in the last 90 days
- Last post
- Oct 26, 2026
- 17 days ago
- Likely audience
- Second Amendment advocates
- Inferred from post content
Open Source Defense is a Substack newsletter by Open Source Defense covering civilian defense, Second Amendment and open source defense. NewsletterFIT indexed 6 posts from it in the last 90 days, most recently on Oct 26, 2026. Shown publicly on Substack: 7K subscribers.
Topics
- civilian defense
- Second Amendment
- open source defense
- gun rights advocacy
Recent posts
- OSD 399:…
- OSD 398:…
- OSD 397:…
- OSD 396:…
- OSD 395:…
- OSD 394:…
Sponsors detected
No sponsored posts detected in the last 180 days of indexed posts.
Detected automatically from posts marked as sponsored. Detection can miss or misread placements.
See the full picture on Open Source Defense
Subscriber momentum over time, every detected sponsor with the source post, companies and people it mentions, guests, and an alert when any of it changes.
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Compiled from public pages · refreshed Nov 4, 2026 · How NewsletterFIT collects and labels data