Flame Hardening

This video details the industrial manufacturing process for machine gun links at Arex Defense in Slovenia. It covers the transformation of raw sheet steel through high-speed stamping, hardening at 850°C, quenching, annealing at 360°C, and final phosphating for corrosion resistance. The facility boasts an impressive annual production capacity of 100 million links.

This video offers an in-depth look at the manufacturing processes at Fabryka Broni 'Łucznik' in Radom, Poland. Expert Ian McCollum guides viewers through the production of modern firearms like the MSBS Grot and Beryl rifles, showcasing the evolution from historical methods to advanced CNC machining, hammer forging, and rigorous quality control. The tour highlights the precision engineering involved in creating components for military-grade weapons.

This video details the challenges and lessons learned during the final testing phase of the AK-50 V1 prototype. Key issues included stacking tolerances requiring precise machining and significant bolt galling due to hardened steel components rubbing under .50 BMG pressure. Despite retiring the V1, the insights gained are crucial for the development of the V3, which targets a $4,499.95 retail price with improved features.

This entry details the custom gunsmithing work of John Martz on Walther P38 pistols. It covers modifications such as creating a compact 'Baby' P38, converting a P38 to fire .45 ACP through significant frame and barrel fabrication, and rechambering for .38 Super. The expertise of John Martz, a WWII veteran and skilled fabricator, is highlighted, emphasizing the high level of craftsmanship involved in these unique, finite collector's items.

This video details the complex process of fabricating a new mainspring for a vintage Marlin Ballard No. 2 Sporting Rifle. It covers diagnosing misfires caused by a weak spring, disassembling the breech block, and precisely shaping new spring stock from annealed steel. The process includes critical heat treatment steps of hardening and tempering to achieve the correct spring properties and a blue finish, along with safety repairs like deepening the half-cock notch and muzzle recrowning.

This video details the expert-level manufacturing process for a Gunwerks LR Series rifle action, starting from a 416 stainless steel blank. It covers critical machining steps including broaching, CNC turning and milling, Wire EDM for precision, and final finishing. The process is engineered for accuracy and concentricity, highlighting Gunwerks' commitment to quality.

Mark Serbu details the complex process of converting a CNC lathe into a 12-barrel blank-firing machine gun. The project highlights the critical role of a lathe's C Axis for precise rotational control and the application of PID control theory to overcome initial firing failures. Modifications were made to ensure the device fires blanks only, avoiding legal issues.

This video demonstrates how to rifle a barrel in a home shop using basic tools, bypassing expensive CNC equipment. It covers material preparation, precise drilling and reaming, and the critical process of pushing a rifling button. While a DIY approach is shown to be possible, the video highlights the significant difference in quality and precision achievable with professional CNC machining.

This video provides an in-depth analysis of the Serbu RN-50 rifle that experienced a catastrophic failure during a Kentucky Ballistics test. Mark Serbu, the designer, meticulously examines the damage, noting severely bent steel side plates, sheared-off breech cap ears, and a sheared pivot pin. The inspection also covers the breech cap's condition, barrel threads, and the stuck casing, revealing a case head separation.

Mark Serbu, designer of the RN-50, addresses a catastrophic failure experienced by Kentucky Ballistics. He reassures customers about the RN-50's safety, attributing the incident to counterfeit or over-pressured ammunition. Serbu highlights the rarity of such events and emphasizes industry transparency, noting that his company has produced approximately 1,400 RN-50s since 2016 with hundreds of thousands of rounds fired without issue.