Out of Spec Rock River Arms Bolt Carrier & Carrier Key

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 is Part 3 of a series focusing on bolt carrier finishes. The video provides a comprehensive master list of bolt carriers and discount codes for various firearm-related products and manufacturers including Centurion, G96, Manta Products, and Challenge Targets. Links to previous parts, the SAS Amazon store, Patreon, and donation page are included, along with social media and website information.

This video focuses on an "Abbreviated Physical/Autopsy" of an RRA BCG (Bolt Carrier Group). While the specific firearms platform isn't explicitly stated in the title or description, RRA (Rock River Arms) is a prominent manufacturer of AR-15 pattern rifles and associated components. The title suggests a detailed examination of the BCG's components and function, akin to a teardown and analysis, likely for informational or review purposes within the AR-15 enthusiast community.

This YouTube video, titled "2 - Salient Arms BCG Physicals" and with a description of the same title, focuses on the physical aspects of a Bolt Carrier Group (BCG) manufactured by Salient Arms. While the exact nature of the 'physicals' is not detailed without a transcript, it implies an examination, inspection, or review of the BCG's physical characteristics, potentially including its build quality, materials, or design features.

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.