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The SMG-45 is a submachine gun manufactured by LWRC International (Land Warfare Resources Corporation), and first displayed at SHOT Show 2015. It is ergonomically based on the AR-15 platform, and uses UMP magazines. It entered full-scale production in 2019 when, in addition to the select-fire military/LE models, pistol braced civilian semi-auto versions became available as well.
"Developed in the private sector for potential foreign military and NGO clients, the PBX-45 offers a powerful .45 ACP alternative to lighter submachine guns. The delayed blowback operating system reduces barrel rise."