Q&A February 2026: Drones, AI, 6.5mm Cartridges, and More

Published on February 27, 2026
Duration: 60:22

This Q&A session from Forgotten Weapons covers a wide array of firearms topics, including historical Peruvian firearms, the mechanics of bullpup rifles, the SKS45's development timeline, and the viability of various modern cartridges. Ian McCollum discusses the design principles behind different firearm actions, the challenges of modernizing older platforms, and the factors influencing barrel life. The discussion also touches upon the future of firearm design, the role of AI in video production, and the practicalities of military adoption of new weapon systems.

Quick Summary

Barrel life is determined by heat erosion at the throat of the barrel, where the chamber meets the rifling. High-pressure cartridges generate more heat, leading to faster erosion and reduced accuracy over time. Low-pressure cartridges like .45 ACP can have effectively indefinite barrel life, while high-pressure rounds like 6.5 Creedmoor may see accuracy degradation after 5,000-6,000 rounds.

Chapters

  1. 00:00Introduction & Sponsor
  2. 01:04Peruvian Firearms: Mausers, Holo R, Ingram M6
  3. 03:24Bullpup Design & Blow-Forward Actions
  4. 05:00SKS45 Mystery: WWII vs. Post-War
  5. 07:27Favorite Gun to Review: Tbley 1921
  6. 08:42Madsen LMG Action: Modern Viability
  7. 11:27Receiving Information from Viewers
  8. 13:17Future of Forgotten Weapons Series
  9. 15:47Kel-Tec Clipfed Pistols: Gimmick or Innovation?
  10. 17:45Why Big Companies Avoid Innovative Pistols
  11. 20:14Definition of Barrel Life & Factors
  12. 22:48AK Last Round Bolt Hold Open: History & Issues
  13. 25:14Future of Braced Handgun Chassis Systems
  14. 27:11Modernizing 1980s Soviet Assault Rifles (AKM/AK74)
  15. 29:29Viability of 8.6mm Supersonic/Subsonic Cartridges
  16. 31:53AI in Video Production & Editing Workflow
  17. 35:20New FN High Power vs. Original
  18. 37:10Why Not Stainless Steel for Military Barrels?
  19. 37:40Converting Trapdoor Springfields to .30-40 Krag
  20. 39:51Military Adoption of 6.5mm Cartridges (Grendel, ARC)
  21. 45:10High-End Rifles vs. 'Good Enough' in Combat
  22. 48:04Future of Anti-Drone Weapons
  23. 49:46Bullpup Ejection Challenges & Solutions
  24. 52:42Shooting PTRD/PTRS41 with Downloaded Rounds
  25. 54:42Firearms Proofing: US vs. Europe
  26. 56:50Suppressing a Shotgun: Possibilities & Complications
  27. 57:44Founding Headstamp Publishing

Frequently Asked Questions

What are some firearms with Peruvian connections that are relatively accessible?

For firearms with Peruvian connections, consider a Peruvian Mauser rifle, often found in 7.65mm Mauser and featuring Peruvian crests. Another option is the Holo R pistol, a Spanish-made handgun with a unique cocking lever, which Peru purchased in 9mm Largo and .380 ACP variants.

Why aren't blow-forward actions more common in modern firearms, especially bullpups?

Blow-forward actions are mechanically complex, quirky, and difficult to make work reliably. This inherent complexity makes them less appealing for mass production, particularly in bullpup designs where the focus is on achieving compactness through other means.

What determines the barrel life of a firearm?

Barrel life is primarily determined by the heat generated during firing, which erodes the throat of the barrel where the chamber meets the rifling. High-pressure cartridges produce more heat, leading to faster erosion and a reduction in accuracy over time.

Are clipfed pistols likely to become a workaround for magazine capacity restrictions?

No, clipfed pistols are unlikely to gain traction as a workaround for magazine capacity restrictions. Many restrictive laws do not distinguish between fixed and detachable magazines, and clipfed systems offer no significant practical advantages over modern detachable magazine pistols.

What are the main challenges in adopting 6.5mm cartridges for military use?

Adopting 6.5mm cartridges like Grendel or 6mm ARC for widespread military use faces significant logistical hurdles. It requires rebarreling all existing platforms, potentially new bolts and gas components, and new magazines, creating substantial overhead for marginal ballistic gains over 5.56mm.

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