The CMMG Action Tuning Kit - What is it and why you need it

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 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 from School of the American Rifle highlights critical manufacturing defects in AR-15 bolt carrier keys, specifically focusing on rough internal bores. Lead instructor demonstrates how a poorly finished carrier key can cause significant friction, premature wear on components like gas tubes, and operational issues, contrasting a problematic new Colt carrier with a well-functioning older model. The expert emphasizes the importance of a smooth bore for reliable function and longevity of expensive parts.

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 guide details the evolution of AR-15 carrier key staking from early 'Gen 1' square staking to modern 'Gen 5' OCKS with serrated heads. It emphasizes proper torque values (vintage 35-40 in-lbs, modern 55-58 in-lbs) and the importance of sufficient metal displacement for screw security. The video, presented by an expert from School of the American Rifle, critiques commercial staking and references historical technical manuals.

This video provides an "autopsy" of an Anderson Manufacturing Bolt Carrier Group (BCG) that failed after only 150 rounds, specifically noting a "sheared lug." The content focuses on a detailed examination of a firearm component failure, suggesting a deep dive into the mechanical aspects and potential causes of the malfunction. This is highly relevant for firearm owners and those interested in the reliability and build quality of AR-15 platforms and their components.

The CMMG Mk47, a hybrid AR-15/AK-47 platform, requires the AK 'rock and lock' manual of arms for magazine insertion, not the AR-15 straight-up method. Incorrect insertion leads to a 'mag-locked' state, preventing reliable feeding. Testing confirms this method works with various AK-pattern magazines, including Magpul, US Palm, and XTech Tactical.

The CMMG P3 screw, or Personal Position Preset, allows users to set a specific stop point for their rifle's stock or brace. It's stored in the Zeroed grip and installed into the Fastback receiver extension using a 7/64" hex wrench. Adjusting the RipStock requires a 1/8" hex wrench, while the RipBrace uses its adjustment lever to clear the P3 screw.

This video highlights essential AR-15 accessories, prioritizing optics and triggers for improved performance. It also covers practical additions like slings, charging handles, and foregrips. The presenter emphasizes that foundational essentials like ammunition and training are paramount, even above hardware upgrades.

This video provides a comprehensive overview of the CMMG .22LR conversion kit for AR-15 platforms. It details the benefits of cost savings and reduced recoil for training, explains the installation process, and highlights important compatibility distinctions, especially for Mk57 uppers. The review also covers operational nuances like the bolt hold-open feature.