Fouling Characteristics & Cleaning Tools Explained. Built for FTT 106 — Module 2 at SDI

[00:00] Introduction & Safety Check: The student introduces the FTT 106 Module 2 course and demonstrates how to safely clear the workspace and verify that all weapons (including an AR-15 and Taurus 380) are unloaded.
[02:10] Manual Action Firearms: An overview of bolt-action, lever-action, and pump-action weapon systems, including how they manually cycle and eject spent casings.
[03:51] Revolvers: A breakdown of single-action and double-action configurations, rotating cylinders, and how shell ejection works in a revolver.
[05:16] Blowback Operating Systems: Explains the mechanics of simple blowback and delayed blowback systems, including how gas pressure cycles the slide.
[07:03] Semi-Automatic Handguns: Details the standard components of semi-auto handguns, such as the slide, barrel, frame, trigger guard, and recoil spring.
[08:36] Semi-Automatic Long Guns (AR-15): Explores the AR-15 platform, focusing on direct impingement gas operation, the bolt carrier group (BCG), and the upper and lower receivers.
[10:37] Fouling Characteristics: Discusses the sources, colors, locations, and effects of different types of firearm buildup, including carbon fouling, copper fouling, and lead/powder fouling.
[13:04] Maintenance Requirements by Firearm Type: Outlines the recommended cleaning intervals, critical inspection areas, and lubrication methods for bolt-action rifles, revolvers, semi-automatic handguns, and gas-operated long guns like the AR-15.
[17:13] Cleaning Tools: A guide to matching the right cleaning tools (bronze bore brushes, jags, solvents, scrapers, etc.) to specific firearm mechanisms.
[20:39] Summary & Conclusion: A final recap of the different operating systems and the importance of maintenance, followed by the module's works cited.
From the Range to the Bench: Firearm Systems, Fouling Characteristics & Cleaning Tools Explained. Built for FTT 106 — Module 2 at the Sonoran Desert Institute.
Applicable to anyone serious about firearms, safety, and the craft of gunsmithing.

Whether you’re a shooter, student, or aspiring gunsmith — understanding how your firearm operates is the foundation of safe, effective gun handling. This presentation breaks down every major operating system — bolt action, lever action, pump action, revolvers, blowback, and semi-automatic platforms — in clear, professional detail.We go beyond the basics: learn exactly where carbon, copper, and lead fouling accumulates based on each platform’s mechanical design, how often to clean it, and which specific tools to use and why. Featuring AR-15 and Taurus .380 ACP safety verification procedures, component-level breakdowns, and cited references.

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