Machining and assembling trigger housings!

This guide details the quick-change barrel demonstration of the FN Model D, as presented by experts from Brownells and Rock Island Auction Company. It highlights the mechanical lineage of the design, influenced by John Moses Browning's original BAR and leading to later models like the M240. The video emphasizes the advanced engineering for its time, including features like a quick-change barrel, adjustable gas system, and robust construction.

This video from Tactical Rifleman focuses on the essential field maintenance and inspection procedures for the M240 general purpose machine gun. While acknowledging the general appeal of action footage, the content is geared towards educating "warfighters" on keeping the "warpig" operational in combat. The description emphasizes the importance of proper maintenance for reliable function during critical situations, highlighting the "sexy" aspect of a "singing" M240 on the battlefield.

This guide details the field stripping process for the Ohio Ordnance M1918A3 BAR, as demonstrated by Ian McCollum. It covers the removal of the buttstock, bolt carrier, bolt, trigger group, and barrel, highlighting the differences from original military versions, particularly the semi-automatic, closed-bolt, hammer-fired system. The video emphasizes the quality of the reproduction and its use of original parts where possible.

This guide details the complex process of converting a lathe into a 12-barrel blank-firing gun, as demonstrated by Mark Serbu. It highlights the critical engineering challenges, including precise alignment, CNC control, and the application of PID theory to overcome firing inconsistencies. The project emphasizes safety and legal considerations, focusing on blank ammunition to avoid machine gun manufacturing regulations.

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 expert-level analysis of a catastrophic failure of the Serbu RN-50 rifle, presented by the firearm's designer, Mark Serbu. The examination focuses on the severe damage to the receiver, breech cap, and barrel assembly, offering insights into potential failure points and the effects of extreme forces. The analysis also touches upon the ammunition used, specifically SLAP rounds, and their potential role in the incident.

Mark Serbu, a gun designer, addresses the RN-50 blow-up incident involving Scott from Kentucky Ballistics. Serbu reassures customers that the RN-50 is a safe design, attributing the incident to a counterfeit and faulty ammunition round. He emphasizes the importance of sourcing ammunition carefully and highlights the rifle's extensive safe operational history.