Gauging, Replacement, & "Dimple" Staking of the AR15 Carrier/Gas Key

This video from CMMG provides a detailed, step-by-step guide on how to install the forward assist adapter, anti-bounce weight, and sear trip kit for their .22 Conversions. It aims to answer common customer inquiries and demonstrates the process clearly. The description also encourages viewers to sign up for CMMG Insider for future updates and directs them to the CMMG website and social media channels (Instagram and Twitter).

This video addresses a common issue encountered when using .22 Conversion kits with AR-15 platforms, where manufacturing variances can cause compatibility problems. The "Quarter Trick" is presented as a simple and inexpensive solution to rectify these issues. The video encourages viewers to become CMMG Insiders for updates on new releases and provides links to CMMG's website, Instagram, and Twitter for more information and engagement.

This YouTube video focuses on a common and crucial aspect of firearm ownership: the buffer system. The title, "What buffer system do you use?", directly asks for viewer input on their preferred buffer systems. While the description is empty, the title alone indicates a discussion or inquiry into different buffer systems, which are vital components for the reliable operation of firearms, particularly semi-automatic rifles like the AR-15 platform. Viewers interested in firearm maintenance, customization, or performance optimization would find this content relevant.

This YouTube video offers practical tips and techniques for polishing stainless steel firearm components. The content focuses on achieving a high-quality finish on gun parts, likely aimed at gunsmiths, hobbyists, and firearm enthusiasts looking to customize or maintain their weapons. The video emphasizes real-world application and likely demonstrates various methods and tools used in the polishing process for stainless steel firearms.

This video focuses on the process of upgrading an AR-15 rifle. While the description is brief, the title clearly indicates modifications and potential part installations. This type of content typically appeals to firearm enthusiasts interested in customization, gunsmithing, and improving their shooting platforms. Viewers can expect insights into available upgrades and how they might enhance performance or aesthetics.

This guide, presented by School of the American Rifle, details how to identify and replace a malformed weld spring in an AR-15 Delta Ring assembly. A misaligned weld spring can cause the gas tube to be pushed off-center, leading to excessive friction or damage to the carrier key and gas tube. Replacing the faulty component ensures proper gas tube alignment and firearm reliability.

This video details the diagnosis and repair of a feeding issue on a Sons of Liberty Gun Works East India upper receiver. The root cause was identified as a sharp burr on the barrel extension's feed ramp, causing rounds to jam. The solution involved polishing the feed ramps and adding a secondary bevel, replicating Colt's design, which successfully resolved the malfunction.

This video demonstrates the internal mechanics of an AR-15 bolt carrier group using cutaway models. It highlights the importance of internal bore dimensions for gas system efficiency and explains how to diagnose potential issues like gas leaks. The demonstration covers the cycle of operation, critical seals, and common manufacturing defects, offering advanced insights for AR-15 maintenance and troubleshooting.

This video provides a detailed autopsy of a faulty AR-15 Bolt Carrier Group (BCG). The analysis reveals critical manufacturing defects including an undersized bolt tail failing gauges, excessive firing pin protrusion causing pierced primers, an oversized firing pin hole, and an oversized cam pin hole leading to headspace issues. These flaws significantly compromise the BCG's function and reliability.

This video demonstrates a specialized technique for swapping an AR-15 rear takedown pin without full firearm disassembly. It highlights the use of a custom-fabricated tool, often made from a 1/16 inch Allen wrench, to depress the detent. The method allows for efficient pin replacement, particularly useful on rifles with staked castle nuts, by leveraging the old pin to guide the new one into place.