Stamping FAIL!

Mark Serbu details the transition from machining an aluminum receiver for the Diabolos prototype to stamping a steel version. He highlights the speed advantage of stamping, comparing minutes of machining to seconds of stamping. The video demonstrates the use of a 200-ton hydraulic press and discusses material preparation, including annealing high-carbon alloy steel for optimal stamping results.

This video documents a beginner's first attempt at sheet metal stamping, specifically 18-gauge mild steel. The creator was inspired by the aesthetic of the WW2 German Sturmgewehr and aimed to achieve a similar look for a universal trigger housing. The video showcases the process and the creator's satisfaction with the initial results, highlighting a learning experience in metalworking techniques.

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.