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This video touches on a firearm malfunction, a humorous trophy related to firearms, and a discussion about ammunition quantities for a reenactment. It also briefly mentions historical firearms in comparison to modern ammunition needs.

This video experimentally tests what happens when ammunition is fired outside of a gun's chamber. Contrary to some misconceptions, firing cartridges without a barrel and chamber results in significantly reduced velocity and energy, often with incomplete powder burn. Even large calibers like .50 BMG and shotgun shells show minimal projectile movement and energy when ignited this way, highlighting the critical role of the firearm's design in harnessing explosive force.

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 experiment tests the bullet-stopping power of approximately 1300 lbs of Jello across three 55-gallon barrels. Smaller calibers like .22 LR and 9mm were stopped easily, while larger handgun rounds like .44 Magnum and .50 AE penetrated into the second barrel. Rifle rounds such as 5.56 and 7.62x39 were also stopped by the Jello, with .308 penetrating into the second barrel. The most powerful rounds, .500 Nitro Express and .700 Nitro Express, were the only ones to fully penetrate all three barrels.

This experiment from Yee Yee Life tests the penetration capabilities of various firearm calibers through standard bricks. The video demonstrates how different rounds, from .22 LR to .50 BMG, interact with brick barriers, showcasing the significant differences in energy transfer and destructive power. The results highlight the effectiveness of larger calibers and higher-velocity rifle rounds in overcoming substantial material resistance.

In this experiment from Yee Yee Life, Parker tests the stopping power of a bowling ball against various firearm calibers, from .22 LR up to .50 BMG. While the bowling ball effectively stops handgun rounds like 9mm and .45 ACP, and even rifle rounds like 5.56 and .308, it is ultimately penetrated by the powerful .50 BMG round. The test highlights the significant difference in energy and penetration capabilities between different firearm calibers.

This video provides a practical demonstration of operating the Heckler & Koch MP7 in both semi-automatic and full-automatic modes. It covers the essential steps of loading, chambering a round, and manipulating the fire selector for different firing modes. The host emphasizes safe handling and proper technique for engaging targets with this compact submachine gun.

This video demonstrates the proper operation of a full-auto HK MP5K, including the iconic 'HK Slap' to chamber a round. It covers deploying the stock, locking the charging handle, and differentiating between semi-auto ('E') and full-auto ('F') firing modes. The demonstration includes live fire in full-auto and shows resulting target accuracy.

This video demonstrates the operation of the fully automatic KRISS Vector in .45 ACP, highlighting its distinct fire modes: semi-auto, 2-round burst, and full-auto. It showcases the platform's high rate of fire and the effectiveness of its Super V Recoil Mitigation system in managing recoil, particularly during full-auto engagement. The demonstration includes proper loading procedures and safety engagement.

The video analyzes the surprising use of Mosin Nagant 91/30 rifles, often with PU scopes, by rear-line troops and militias in the Ukraine conflict. These historical Soviet infantry rifles, officially replaced decades ago, highlight potential supply chain issues for Russian forces when seen alongside modern weaponry. While modernized versions exist, their deployment in this context is notable.