The CMMG Mk4 is a versatile AR-15 rifle and SBR platform that caters to both tactical operators and recreational shooters with its wide range of calibers including 223 REM, 5.56 NATO, and 224 Valkyrie. It offers customization from 10 to 30-round capacity options, and features such as M-LOK handguards, Picatinny rails, and threaded barrels for attachments. The lightweight design, crafted from 7075 T6 aluminum, varies in size with barrel lengths from 7.5” to 18”, and an overall length between 24” and 35”, making it both portable and adaptable. The Mk4 is designed with modularity in mind, featuring an optics-ready configuration or the option for MBUS flip-up sights, catering to precision needs. The finish options include standard black or various Cerakote colors, enhancing durability and aesthetic appeal. Whether equipped with a pistol brace or rifle stock, this model maintains a manageable weight range of 5 to 7 lbs, offering balance and ease of maneuverability for diverse shooting environments.