CMMG Resolute 16.10" Upper 9mm with 1:10 Twist Rate and M-LOK Rail - Carbine-Length with BCG and CH - Armor Black - 99BE6B6AB

If you're in the market to build the ultimate 9mm pistol caliber carbine, look no further than CMMG. Their Radial Delayed Blowback operating system ensures not only one of the softest shooting experiences for a 9mm PCC but also embodies the distinctive CMMG style. This upper group is meticulously designed to interface seamlessly with a variety of lower receivers, providing unmatched versatility. Whether you opt for standard AR-15 lowers with AR-9 conversion mags or any of CMMG's dedicated pistol magazine lowers like MK9, MKGs and MK17, you have the flexibility to craft your ideal PCC configuration. Originally developed for their .45 ACP MKG platform, CMMG has extended their Radial Delayed Blowback system across their entire pistol caliber lineup. This advanced system not only reduces recoil impulse but also optimizes bolt weight, resulting in enhanced performance compared to traditional straight blowback systems. For a deeper dive into Radial Delayed Blowback technology, explore CMMG's comprehensive resources including articles and videos. It's important to note that CMMG recommends pairing their .40 S&W MKGs uppers exclusively with MKGs lowers to ensure optimal functionality and performance.