Rare M16 U.S.G.I. Trigger Pull/Weight Gage

This guide, presented by an expert firearms instructor, details the benefits and installation of adjustable triggers for platforms like the AR-15. It covers understanding trigger mechanics, adjusting pull weight, reset, and overtravel, and highlights ideal users for these components. The instruction emphasizes safety and practical application for competition and precision shooting.

This YouTube video provides a guide on how to accurately measure the trigger weight of a Glock firearm. The description highlights that understanding trigger weight is beneficial for both experienced gunsmiths and novice firearm enthusiasts seeking to ensure their firearm's performance. The video encourages viewer engagement through comments and directs viewers to a linktree for more content.

This video explains the historical origins and design rationale behind the AR-15/M16 forward assist. It details how the US Army's requirement for a manual bolt closure mechanism, stemming from their experience with reciprocating charging handles, led to its inclusion, despite initial design intentions by Eugene Stoner and Colt. The speaker highlights the debate over its necessity, noting that forcing a fouled bolt can worsen jams.

This video provides a practical tutorial on how to measure firearm trigger pull using a trigger pull gauge. Steve Ostrem demonstrates the process, highlighting various types of gauges available, including electronic and mechanical scales with different weight capacities. The description also lists specific product codes for the gauges shown and directs viewers to a website for more information, suggesting a focus on gunsmithing or firearm maintenance tools.

This video introduces the Deployable Compact Armorers Tool (D-CAT) from Space Age Weaponry. The D-CAT is designed to fit within the storage compartment of a standard AR-15/M-16 fixed buttstock and weighs only 6 ounces. The description highlights it as the sole tool required for complete assembly or disassembly of the AR-15/M16 platform from its component parts. Further information and ordering details can be found on Brownells' website.

This video from Brownells demonstrates the process of installing a two-piece, four-rail handguard onto an AR-15 or M-16 platform. The tutorial focuses on the practical steps involved in removing an existing handguard and fitting a new one with multiple Picatinny rail sections, likely for accessory mounting.

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.