Inside the MPA-971 feeding system: Suomi drums, quad‑stack mags, and the rat‑tail release

This guide details the handling and shooting techniques for the SITES Spectre SMG, as demonstrated by Ian McCollum. It covers operating the top-folding stock, managing its fast rate of fire, utilizing the unique controls like the internal magazine release and selector pad, and assessing the performance of the 50-round quad-stack magazine. McCollum emphasizes the importance of the stock for controllability and notes potential design quirks.

This guide details the installation and initial function testing of the Desert Tech Quattro AR-15 lower receiver, designed for high-capacity magazines. It covers attaching standard uppers, using the proprietary 53-round quad-stack magazine, and performing a live-fire reliability test. The assessment highlights the impact on rifle balance and compatibility with standard AR-15 components.

The Desert Tech Quattro-15 lower receiver is designed to accept proprietary 53-round quad-stack magazines, offering a significant capacity increase over standard 30-round magazines. It is compatible with any traditional AR-15 upper receiver. The Quattro-15 magazines are notably shorter than other high-capacity options like the Surefire 60-round magazine and fit standard double magazine pouches, enhancing loadout flexibility.

This guide details the installation of the Desert Tech Quattro-15 lower receiver and its proprietary quad-stack magazine system. It covers compatibility with standard AR-15 uppers, the use of ambidextrous controls, and the integration of both the 53-round Quattro magazine and adapters for standard magazines. The process emphasizes safety and proper function checks.

This guide details the process of loading and testing the Desert Tech Quattro-15, a next-generation AR-style rifle. It covers the use of its proprietary quad-stack QMAG-53 magazine and demonstrates rapid-fire reliability on a desert range. The assessment highlights the rifle's smooth cycling and overall performance, as presented by firearms influencer Edwin Sarkissian.

This guide explains why the US military favors standard 30-round box magazines over high-capacity drum or quad-stack magazines. Key factors include cost, weight, logistical simplicity, and paramount reliability. While higher capacity is appealing, the military prioritizes dependable function and ease of integration with standard gear, making the traditional box magazine the preferred choice despite its lower round count.

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.