Ruger® AR-556® Cleaning Tech Tip

This video demonstrates John Lovell's preferred method for lubricating an AR-15, prioritizing oiling over extensive cleaning for standard maintenance. Key steps include applying Slip 2000 EWL directly to the Bolt Carrier Group (BCG) through the ejection port and magazine well, ensuring lubrication of vent holes and internal components. The process also covers lubricating the receiver and star chamber, followed by cycling the charging handle to distribute the lubricant effectively.

This video explains the concept of free-floating barrels in AR-15 platforms, highlighting how they improve accuracy by preventing handguard contact with the barrel. Unlike traditional AR-15s where handguard pressure can shift the point of impact, free-float barrels attach solely to the receiver, preserving barrel harmonics. This design is crucial for precision shooting and custom builds.

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 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 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 in-depth look at the Ruger-57 pistol, presented by Ruger Firearms. It details the advantages of the 5.7x28mm cartridge, including high velocity with lightweight bullets, and showcases the pistol's features such as its 20-round magazine, ambidextrous safety, adjustable sights, and optics mounting capabilities. The presentation highlights the firearm's low recoil and comfortable shooting experience.

This expert-level guide provides a detailed, step-by-step walkthrough for reassembling the Ruger Mark III pistol. It covers crucial safety checks, proper alignment of components like the barrel receiver and mainspring housing, and essential function checks to ensure safe operation. The video emphasizes the importance of specific pin placements and hammer strut alignment, offering insights into potential failure points.

This video provides a detailed guide on disassembling the Ruger AR-556 rifle, emphasizing safety and proper workspace setup. It covers essential steps like clearing the firearm, removing the handguard, separating receivers, and disassembling the bolt carrier group, including the extractor and cam pin. The tutorial highlights specific techniques for each component, offering valuable insights for rifle maintenance and cleaning.

The Ruger AR-556 MPR is presented as a high-value, custom-built AR-15 platform. It features a cold hammer-forged 4140 chrome-moly steel barrel with 5R rifling for improved accuracy and ease of cleaning. The rifle includes premium components like Magpul furniture, a 15-inch M-LOK free-float handguard, and the Ruger Elite 452 two-stage trigger for enhanced performance and ergonomics.