How To Remove And Replace/Install An AR-15 Barrel (HD)

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 process of diagnosing and fixing a significant rail wobble issue on a new Daniel Defense Mk18 upper receiver. The primary cause identified was a hand-tight barrel nut, compromising the stability of the RIS II rail system. The steps involve disassembly, inspection of the barrel nut, proper tightening with an armorer's wrench and torque wrench, and reassembly. This addresses a critical quality control failure that can affect firearm accuracy and reliability.

This video features Caleb from Brownells guiding viewers through a complete AR-15 build chambered in the .338 ARC cartridge. The content highlights the powerful subsonic capabilities of the .338 ARC for hunting and suppressed shooting. Caleb details each component of the build, including the barrel, handguard, gas system, suppressor, and optics, culminating in a step-by-step assembly of the upper receiver. The video serves as a comprehensive guide for those interested in building their own .338 ARC rifle or learning more about this specific caliber and its application.

This entry details the unique XR-86 custom rifle, a 1986 build by Wilfred Ellis. It masterfully combines components from an M60 (flash hider), an M14 (gas system), and an AR-15 (trigger, bolt, locking system). The AR-15 trigger is notably rotated 90 degrees, and its bolt is integrated with the M14 gas system, showcasing advanced gunsmithing.

This guide details the installation of an aftermarket AR-15 trigger, specifically a Timney Triggers product. The process involves unboxing the trigger, identifying its modular components like interchangeable shoes, and then carefully installing it into a lower receiver. A function test is crucial to confirm correct operation. The speaker demonstrates proficiency with firearm components and installation procedures.

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 video details a concerning incident where ATF agents allegedly detained and interrogated a US Navy veteran, Carlo, under the pretense of an investigation into illegal machine guns. Despite the sailor's 20-year record-free service and legal firearm ownership, his high-end firearms, valued at over $20,000, were seized. The narrative highlights potential overreach by law enforcement, issues with consent for searches, and the emotional toll of such encounters, particularly in light of personal tragedy.

This video addresses confronting groups of armed violent criminals, emphasizing the need for superior firepower over handguns. It recommends shotguns like the Savage 12 gauge or Mossberg Maverick 88 as budget-friendly options, and Pistol Caliber Carbines (PCCs) like the Ruger PCC for ease of use and capacity. Intermediate caliber rifles, specifically the AK and AR platforms (PSA GF3 AK, Stag Tactical AR-15), are presented as the optimal choice due to their capacity, range, and terminal ballistics.

This video from Mrgunsngear Channel discusses ATF agents conducting door-to-door inspections of individuals who have purchased multiple firearms. The host, demonstrating expert knowledge of firearms regulations and constitutional rights, explains that these inspections are often conducted without warrants and homeowners have the right to refuse entry. The practice stems from the Gun Control Act of 1968's multiple purchase reporting requirements, intended to flag potential straw purchases.

This guide details a standard AR-15 cleaning and lubrication routine, focusing on post-range maintenance rather than deep cleaning. It covers essential steps from safety checks and disassembly to applying CLP and grease to specific components like the bolt carrier group (BCG) and barrel. Proper reassembly and function checks are emphasized for reliable operation.