What makes the HK416 such a successful weapon? With firearms expert, Jonathan Ferguson

This guide details the field stripping process for the rare Armalite AR-16, as demonstrated by Ian McCollum on Forgotten Weapons. It covers the disassembly of the bolt, recoil springs, and gas piston, highlighting the rifle's unique internal mechanisms. The AR-16 is presented as an important transitional design between the AR-10 and AR-18.

This expert guide from School of the American Rifle details how to identify and replace a malformed weld spring in an AR-15's delta ring assembly. A misaligned weld spring can cause gas tube issues, leading to potential component damage. The video provides a clear visual comparison and step-by-step instructions for replacement, emphasizing proper alignment for optimal function.

This guide addresses a common failure point for AR-15 charging handles, where the component can shear off at the gas key interface. The video highlights a user's experience of a charging handle breaking on its first day at the range, suggesting either a defective part or an issue with an older firearm. The expert emphasizes that a broken charging handle requires immediate replacement.

This guide addresses a critical quality control issue identified by Shortshot Tony on a new Daniel Defense Mk18 upper receiver: a loose barrel nut. The video demonstrates how a hand-tight barrel nut leads to significant rail wobble. It highlights the importance of proper torque for AR-15 assembly and compares this failure to lower-tier brands, emphasizing the need for robust quality control even on premium components.

This guide details the process of lapping an AR-15 receiver to ensure proper barrel alignment for improved long-range accuracy. Instructor Stephen Caleb from Brownells explains that receiver faces can be slightly out of alignment, leading to barrel runout. The process involves using a specialized lapping fixture and aluminum oxide lapping compound with a drill to create a perfectly flat receiver face. This ensures the barrel seats flush and square, critical for precision shooting beyond 500 yards.

This guide details how to reload budget-friendly 223 Remington ammunition using Berry's 55 and 62 grain bullets and Accurate 2520 powder. It covers component selection, progressive press setup, load data considerations, field testing with a chronograph, and cost analysis, highlighting significant savings by reusing brass. The presenter, Serena, brings over 10 years of competitive service rifle experience and extensive behind-the-scenes work at Ultimate Reloader.

Ian McCollum and Jonathan Ferguson of the Royal Armouries present a challenge to find three unique firearms based on appearance, mechanical oddity, and historical impact. They showcase experimental and rare pieces like the Charlton Automatic Rifle, Sterling 7.62mm prototype, Schwarzlose Model 1898, Gabbett-Fairfax Mars pistol, an SA80 prototype, and a BSA Machine Carbine, highlighting their unusual mechanisms and limited adoption.

This entry details the Knight's Armament KS-1 (L403A1), the British Army's new Alternative Individual Weapon, adopted under Project Hunter. Expert Jonathan Ferguson from the Royal Armouries provides an in-depth look at its features, intended use for specialized units, and its role in supplementing existing platforms like the SA80.

This guide details the process of arming an 11th-century Norman knight, as explained by an institutional expert from the Royal Armouries. It covers the sequence of donning essential protective gear, including padded undergarments, a mail hauberk, a nasal helmet, and a kite shield, emphasizing weight distribution and historical construction techniques.

This guide details the installation and operation of the Harston's Patent Mark IV magazine, a rare modification designed to convert the single-shot Martini-Henry rifle into a repeater. Expert Jonathan Ferguson explains the mechanism, its inventor Captain Charles Gravelle Harston, and the historical context of its development. The guide covers fitting the magazine, the cycling process for feeding rounds, and the use of the cutoff device for single-shot operation, while also noting potential reliability issues and the high conversion cost.