Rate of Fire: What Determines it and How to Change It

This guide provides an expert overview of the FNAB-43 submachine gun, drawing on Ian McCollum's detailed analysis. It covers the firearm's unique folding magazine well, its closed-bolt operation with distinct selector levers, and the intricacies of its delayed blowback system. The information is presented with a high degree of authority, suitable for intermediate-level enthusiasts interested in historical firearm mechanics.

This guide details the installation of a Drop-In Auto Sear (DIAS) into an AR receiver, a process that converts the firearm to full-auto. The DIAS is a self-contained, legal machine gun that can be moved between compatible AR platforms. Due to its NFA classification, understanding its legal status and transferability is crucial. The video highlights the extreme rarity and high market value of pre-1986 registered DIAS units.

This entry details the operation of the Thompson Model of 1921, focusing on its iconic drum magazine and select-fire mechanism. Expert Ian McCollum provides a close look at the firearm's internal workings, including the winding of the 50-round drum and the firing cycle. The information is presented with a high degree of technical detail, suitable for enthusiasts and those interested in historical firearms.

This guide covers the partial disassembly of the Madsen Model 1945 submachine gun, as demonstrated by Ian McCollum. It highlights the challenges encountered even with reference materials, emphasizing the complexity of this rare firearm. The video showcases the importance of understanding historical firearms and the potential difficulties in their maintenance.

This guide details the unique gas-operated, swinging lever mechanism of the Marlin Model 1917 Machine Gun, a licensed Colt design. Expert Ian McCollum explains how gas pressure from a port under the barrel actuates a lever connected to the operating slide, cycling the action. The nickname 'Potato Digger' is attributed to the lever's violent motion.

This guide provides an overview of the Hyde/Marlin M2 submachine gun's disassembly, as presented by Ian McCollum. It highlights the firearm's unique construction, including its sintered metal components and open bolt blowback mechanism. The M2 is noted for being lighter and cheaper to produce than the M1 Thompson, utilizing compatible magazines.

This guide details the specific technique for separating two MAS-36 rifles that have been inadvertently locked together by their bayonets. It outlines the historical context of this issue, the modification made to the bayonet to resolve it, and the step-by-step procedure for disengagement. The technique requires precise alignment and the use of a pointed tool to access the internal release mechanism, as demonstrated by firearms expert Ian McCollum.

This guide details the loading and firing procedure for the M134 Minigun, as explained by Ian McCollum. It covers manual indexing of the barrel cluster, feeding the ammunition belt, engaging controls, and firing. The guide also touches upon the weapon's spin-down inertia and the function of modern clutch systems. Expert instruction from a recognized firearms historian highlights the technical aspects of operating this powerful weapon system.

This guide details the operational features of the H&K G11 K2, a prototype assault rifle known for its caseless ammunition and unique rotating drum bolt. It covers the selector settings, magazine capacity, integrated optics, and the internal action designed for recoil management during high-rate-of-fire bursts. Expert insights from Ian McCollum highlight the historical context and technical innovations of this advanced firearm.

This guide details the operation of the German L.Gr.W.36 50mm light mortar, as demonstrated by expert Ian McCollum. It covers assembly, leveling procedures, ammunition handling, and live fire execution, emphasizing the difficulty in visually tracking the projectile. The instruction highlights the importance of proper setup for accuracy.