9mm brass, .223 brass, .308 brass...

This YouTube video promotes merchandise designed to support Pets & Vets, featuring designs related to "Caliber Effectiveness." While the video focuses on merchandise rather than a specific firearm demonstration or review, the title and description clearly indicate a connection to firearms and calibers. The merchandise itself uses the concept of "caliber effectiveness" which is a topic of interest within the firearms community. The video aims to raise awareness and support for a charitable cause involving pets and veterans.

This YouTube Shorts video from Ammo Squared challenges viewers to guess the correct firearm caliber. The title directly implies a quiz format focused on ammunition types. While no specific firearms or calibers are mentioned in the description, the title and channel name strongly suggest the content revolves around firearms and their associated calibers. The short format indicates a quick, engaging quiz designed for a firearms enthusiast audience.

This YouTube video, titled "Minhas Munições Mais Potentes" (My Most Powerful Ammunition), likely showcases and discusses various types of high-power ammunition. Based on the title, viewers can expect content related to different calibers and potentially their performance characteristics, aiming to highlight the most potent rounds available. The video may involve demonstrations, comparisons, or discussions about the effectiveness of these powerful cartridges for various applications.

This video, titled 'The Ammo King,' likely focuses on various aspects of ammunition, potentially including reviews, comparisons, or discussions about different calibers and their performance. Given the title, the content may also touch upon firearms that utilize these ammunitions, or the broader market and availability of ammunition.

This video from GFG outlines five key warning signs that could indicate an impending ammunition shortage. Drawing on the 2020 shortage, the instructor highlights military contract surges, sudden spikes in gun sales, retail purchase limits, rising ammo prices, and the disappearance of cheap bulk ammunition as critical indicators for gun owners to monitor.

This video discusses the importance of stockpiling specific ammunition calibers before 2026, citing rising prices and potential shortages similar to 2020. It aims to guide viewers on essential calibers to acquire to avoid future scarcity and inflated costs. The video emphasizes proactive preparation for potential market fluctuations.

This RECOILtv episode dives into the Micro Uzi, a compact submachine gun with a high cyclic rate of 1250 RPM. Hosts Dave Merrill and Dave Rhoden explore its history, technical features like compensator ports, and demonstrate its intense full-auto performance. The review highlights the evolution from the original Uzi to smaller, faster-firing variants and compares its handling to a 'fire hose'.

This video provides an exclusive look inside a Ukrainian subunit armory in 2024, showcasing the diverse weaponry and equipment in use. It highlights the transition from Soviet-era arms to Western platforms like Daniel Defense rifles, FN SCARs, and CZ Bren 2s, alongside heavy support weapons such as the M2 Browning and Mark 19. The armory also features various anti-armor systems, machine guns, and standard-issue Glock 17 pistols, illustrating the evolving nature of modern warfare.

This episode of War Stories features legendary CIA and Special Forces operator Billy Waugh, detailing his extensive career in covert operations. Waugh shares insights from his service in Korea, Vietnam with MACV-SOG, and tracking high-value targets like Carlos the Jackal and Osama bin Laden in Sudan. He highlights pioneering HALO jump techniques and the critical role of intelligence gathering through reconnaissance photography.

The PKM is highlighted as a top-tier medium machine gun, praised for its lightweight design and robust Soviet construction. Its 7.62x54R caliber and unique two-stage feeding mechanism, stemming from its non-disintegrating belt, are detailed. The review covers field stripping, internal Kalashnikov-based design, loading procedures, and a live-fire demonstration showcasing controllable automatic fire.