Avangard AR Upper!

This review of a 9mm AR-15 by Mark Serbu, a recognized gun designer, delves into its functionality, historical context, and potential issues. Serbu highlights the use of Glock magazines with a magwell adapter, discusses trigger pack design, and analyzes bolt velocity and its impact on trigger slap, especially in converted full-auto variants. He also details the effectiveness of heavy buffers and stronger springs in managing rate of fire and recoil, comparing it to Uzi and MP5 submachine guns.

This video provides an in-depth look at the Czechoslovakian VZ-61 Scorpion submachine gun, focusing on its unique features and historical context. Mark Serbu, a gun designer, shares his excitement about acquiring and demonstrating the firearm, highlighting its 32 ACP caliber, 20-round magazine capacity, and the function of its rate reducer. The video also touches on the availability and cost of parts kits, the craftsmanship involved in its production, and comparisons to other firearms.

Mark Serbu, a gun designer, reviews the SIG AMT, a civilian version of the Swiss PE57 military rifle. He highlights its beautiful Swiss craftsmanship, its chambering in 7.62x51mm (.308 Winchester), and its delayed roller locked action with a fluted chamber. Serbu expresses his long-held desire to own this 'holy grail' firearm and shares his initial impressions after shooting it.

This video provides an overview and demonstration of the Reising Model 50 submachine gun, a firearm from the World War II era. The presenter, Mark Serbu, highlights its unique design features, including a distinctive cocking lever, a sliding hammer mechanism for semi-auto fire, and a full-auto engagement hook. He discusses its historical context, rarity, and the surprising influence it had on later firearm designs, despite not achieving widespread popularity. The video also includes a brief shooting demonstration and observations on its handling and trigger.

Mark Serbu reviews the Avidity Arms PD10 pistol, highlighting its chambering in 30 Super Carry and its similarities to a Glock platform. He praises the firearm's excellent machining quality, comfortable ergonomics, and impressive trigger. The review includes shooting impressions at approximately 10 yards, demonstrating good accuracy, and a comparison to a smaller carry gun.

This guide details the technique for managing recoil on the Serbu Super Shorty, as demonstrated by Ian McCollum. It emphasizes the importance of applying forward pressure on the folding vertical foregrip to control the firearm during rapid fire. The video highlights the firearm's origin story and its unique design considerations.

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.