Firearms Facts Episode 25: History of the MAC-10

This review details the SAP M10, a semi-automatic variant of the MAC-10, retaining its open-bolt design. It highlights the internal mechanism, including the disconnector and sear, crucial for semi-auto function. The video also touches upon the legal implications and ease of conversion to full-auto, which attracted law enforcement attention.

This review details the RPB Semiauto M10 SAP, an open-bolt pistol developed as a cheaper alternative to the full-auto MAC-10. It highlights the firearm's simple blowback operation, unique RPB 'Cobra' logo, and the ATF's 1982 ruling that reclassified such designs, leading to production cessation. The video also contrasts the semi-auto trigger group with its full-auto counterpart, noting the ease of conversion.

This video provides an expert-level overview of the new HUXWRX FLOW 45M modular suppressor, presented by Brett from HUXWRX at SHOT Show 2026. Key features include its 3D-printed titanium construction, modular design allowing for different configurations, and HUXWRX's signature flow-through technology. The suppressor is noted for its ease of maintenance, utilizing a standard 1/2-inch drive ratchet for disassembly, and its broad caliber compatibility.

This video explores various Heckler & Koch MP5 variants, including the MP5SD and MP5K, highlighting their historical significance and technical features. The hosts discuss the effectiveness of subsonic ammunition with suppressors and compare the controllability and cyclic rates of different models. Ultimately, the full-size MP5 is deemed the most practical, while a $60,000 transferable MP5 machine gun is featured in a giveaway.

This video showcases the HK MP5-N submachine gun with a suppressor attached. It highlights the firearm's modularity, demonstrating suppressor attachment and the iconic 'HK slap' for chambering rounds. The live fire segment emphasizes the suppressed MP5-N's manageable recoil and quiet operation during rapid fire and tactical reloads.

The Hyde/Marlin M2 is a rare submachine gun positioned between the Thompson and Grease Gun. It's lighter and cheaper to produce than the Thompson, utilizing compatible magazines. Its design incorporates George Hyde's innovative use of metal sintering for complex internal parts, a process involving powdered metal molded under heat and pressure.

This video hilariously tests a heavily accessorized AR-15, dubbed the 'Zombie Carbine,' as a parody of excessive tactical gear. The build, based on a Smith & Wesson M&P15, weighs 23 pounds fully loaded with 270 rounds across nine magazines. It features multiple optics, lasers, lights, and is demonstrated with rapid fire, hip sniping, and Tannerite explosions.

This "ultimate AR-15 meltdown" test pushes a custom build to its limits, revealing key durability insights. The Faxon barrel ultimately burst after 830 rounds, but critical components like the Sharps SRC bolt carrier group and Geissele rail demonstrated impressive resilience under extreme stress and heat. The test highlights the AR-15 platform's robust design, even when subjected to conditions far exceeding typical operational use.

This video showcases an extreme full-auto durability test of a premium Definitive Arms VEPR AK, comparing it to a budget WASR-10. The VEPR AK demonstrated exceptional resilience, enduring 895 rounds before failure, significantly outperforming the WASR-10 and even a previously tested AR-15. The expert analysis highlights the AK platform's inherent durability and heat management characteristics, even under severe stress.

This video demonstrates the legendary durability of the AK platform by subjecting a Yugo M92 PAP to a 700-round continuous firing test. Despite extreme heat causing significant smoke and glowing metal, the firearm remained functional, showcasing Mikhail Kalashnikov's robust engineering. The test concludes with a cooling process and a tribute to the designer's legacy.