Wildebeest Pistol!

Mark Serbu, a firearm designer with extensive experience, reviews a 9mm AR-15 upper. He details the use of Glock magazines with a magwell adapter and analyzes the impact of bolt velocity on trigger slap, particularly in full-auto configurations. Serbu demonstrates how a heavy buffer and stouter spring can significantly reduce the rate of fire and improve handling, comparing it to factory Colt designs and noting the jarring bolt impact even in semi-auto.

The RN-45 is a custom-built firearm by Royal Nonesuch, featuring a unique blend of parts including a Sten Mark III receiver, M3 Grease Gun bolt, and AK-style stock. High-speed footage reveals feeding issues and occasional misfires due to cartridge bounce in the chamber. The build's rate of fire is confirmed at 465 RPM.

The Serbu Super Shorty, initially deemed 'dumb' by its creator Mark Serbu, became a popular product for Serbu Firearms. This 12 Gauge AOW shotgun features a folding foregrip for recoil management and is designed for close-quarters use, not precision. Live fire testing reveals significant recoil, emphasizing the need for forward pressure on the grip for control.

This review details a custom 10mm firearm built by 'Trenches' from the Weapons Guild, featuring a lever-delayed blowback action inspired by the FG42. Mark Serbu analyzes its unique construction from off-the-shelf parts and a modified M3 Grease Gun magazine. He highlights the mechanism's 'momentum amplifier' effect but also points out design flaws in the lever's discontinuous movement causing high stress and reliability issues, suggesting potential improvements.

This review showcases the unique Serbu Micro .50 BMG, a custom firearm with a 10-inch barrel based on the RN-50 receiver. Despite its compact size, initial firing tests revealed manageable recoil. The video includes penetration tests comparing different barrel lengths and destructive capability tests using API rounds against oxygen tanks, highlighting the .50 BMG's power.

This video showcases the unique Serbu 50 BMG Micro rifles, featuring 10-inch barrels and a break-action design. The creator demonstrates firing two simultaneously, highlighting the extreme recoil and shockwave generated by the .50 BMG caliber. The review emphasizes the custom build aspect and the intense physical experience of handling these powerful, compact firearms.

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.