The discussion opens by tackling the recurring argument over what 5.7x28 actually is: pistol round, rifle round, or something in between. It is framed as a purpose-built PDW- and carbine-oriented pistol cartridge, essentially a small, bottlenecked case designed to be fired from compact platforms. The hosts contrast it with 9mm and 5.56, explaining that 5.7x28 was developed by FN around 1990 as a potential replacement for 9mm NATO. They outline how FN’s 5.7 competed directly with HK’s 4.6x30, used in the MP7, during NATO evaluations in the early 2000s. Most participating countries favored 5.7, while Germany pushed for 4.6, delaying consensus. Eventually, NATO standardized 5.7x28 around 2021, and more than 40 countries have adopted it in some capacity. The video highlights key 5.7 platforms such as the FN P90 PDW, the FN Five-seveN pistol, AR-15 uppers like the AR57 that feed from 50-round P90 magazines, and Kel-Tec designs including the P50, R50, and PR57 with its rotating barrel and internal magazine fed by stripper clips.
The video then compares 5.7x28 directly to 9mm, focusing on recoil, velocity, and downrange behavior. 5.7x28 uses much lighter projectiles at significantly higher velocities, which produces softer felt recoil and a flatter trajectory that can translate into better practical accuracy, especially for fast follow-up shots. However, 9mm’s heavier, wider bullets carry more energy; the hosts note that some 9mm loads retain more energy at 100 yards than 5.7x28 has at the muzzle. They emphasize that 5.7 sheds velocity quickly over distance. Specific numbers are mentioned, including very hot commercial 5.7 loads like VioKe running around 2,100 feet per second. The importance of test barrel length is stressed: original FN data often used the P90’s 10.5-inch barrel, while civilian platforms like the 16-inch PS90 or AR57 uppers can produce different velocity figures. The segment also reminds viewers that the original P90 specification centered on armor-defeating ammunition, which is generally unavailable on the civilian market, and that modern commercial 5.7 loads differ from those early military designs.
Attention shifts to the practical advantages of 5.7x28 platforms in terms of capacity, weight, and controllability. The FN Five-seveN pistol offers a standard 20-round magazine, immediately outpacing many traditional handgun calibers. The P90’s iconic 50-round top-mounted magazine is highlighted as standard capacity, yet a fully loaded P90 magazine weighs roughly the same as a loaded AR-15 magazine. Because 5.7 bullets are light, overall recoil is notably reduced, making rapid strings of fire easier to control. The PS90, the civilian carbine version of the P90, is singled out for its extremely low felt recoil, making it attractive for recoil-sensitive shooters or those wanting very fast follow-up shots. Its fully ambidextrous controls include bilateral safeties, charging handles, and magazine releases, plus downward ejection that avoids hitting the shooter with brass. The PS90’s triple iron sight arrangement is described as unusual but functional. Similarly, the AR57 upper uses P90 magazines on top and ejects spent cases downward through the AR-15 magwell, keeping brass out of the shooter’s face and simplifying brass collection.
The hosts underscore that 5.7x28 is not just a range novelty by pointing to real-world users and a broadening industry ecosystem. Protective details similar to the U.S. Secret Service have fielded P90-style PDWs, valuing their compact size, controllability, and high capacity for close-protection roles. Various military and police units worldwide have adopted the P90 or PS90 derivatives, with early U.S. law enforcement adopters including Texas SWAT and patrol officers who wanted a lightweight, high-capacity shoulder-fired option. The conversation then catalogs the growing list of manufacturers supporting the cartridge. Beyond FN and Kel-Tec, companies like Ruger and Smith & Wesson now offer 5.7 pistols, while CMMG’s Banshee line provides AR-pattern options. Tisas and Masterpiece Arms also contribute platforms, signaling that 5.7x28 has moved beyond a single-manufacturer experiment. This diversity of firearms and ammunition options is presented as strong evidence that the cartridge has meaningful staying power in both professional and civilian markets.
In closing, the video looks ahead at where 5.7x28 may be going and how it fits into modern self-defense. Despite being only about three decades old, the cartridge now appears firmly established, and the hosts argue it is likely to remain in production long term. They speculate about future hyper-velocity 5.7 concepts, such as hybrid cases with steel reinforcement to handle higher pressures. The original 5.7 projectile is noted as a patented 1989 design featuring a polymer core, part of its early armor-defeating intent. For civilian defensive use, the emphasis shifts to controllability and capacity: a 5.7 pistol commonly offers 20 rounds on board, compared with traditional .45 ACP pistols that may carry only seven. This allows more chances to place accurate shots with less recoil. Ammunition cost is addressed as well. While 9mm remains cheaper, 5.7x28 has become more affordable and widely available thanks to manufacturers like American Eagle, moving it out of a boutique niche and into a realistic option for enthusiasts and defensive shooters.
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