Description The CMMG Resolute MK4 .300 AAC Blackout rifle delivers exceptional performance in a modular, reliable platform designed for shooters who demand precision and versatility. This semi-automatic rifle combines CMMG’s proven engineering with the effectiveness of the .300 Blackout cartridge, making it an ideal choice for tactical applications, hunting, and target shooting. The 16.1-inch tungsten barrel provides superior durability and heat dissipation while maintaining optimal velocity for the .300 Blackout round. With its 30-round capacity and refined ergonomics, the Resolute MK4 .300 represents the pinnacle of modern AR platform design. Table of Contents Toggle CMMG Resolute MK4 .300 AAC Blackout — Key SpecificationsPerformance & ReliabilityIntended Use & ApplicationsWhy Buy From CaliperDepot? CMMG Resolute MK4 .300 AAC Blackout — Key Specifications Caliber: .300 AAC Blackout Barrel Length: 16.1 inches Barrel Material: Tungsten with premium finish Action: Direct Impingement Semi-Automatic Magazine Capacity: 30 rounds Overall Length: Approximately 36.6 inches Upper Receiver: 7075-T6 aluminum with M4 feed ramps Lower Receiver: CMMG-designed forged aluminum Handguard: Free-floating aluminum for precision and accessory mounting Trigger: Single-stage combat trigger Safety: Ambidextrous manual safety lever Charging Handle: Ambidextrous charging handle for left and right-handed shooters Stock: Six-position adjustable stock for customized length of pull Sights: Picatinny rails for optic mounting Muzzle Device: Permanently pinned or flash hider configuration Performance & Reliability The CMMG Resolute MK4 .300 AAC Blackout delivers consistent, reliable performance across diverse shooting scenarios and environmental conditions. The tungsten barrel construction provides exceptional heat resistance and longevity, maintaining accuracy even during extended shooting sessions. This rifle’s direct impingement system ensures reliable cycling and minimizes maintenance requirements, making it a dependable choice for serious shooters. The Resolute MK4 .300 has earned a reputation for dependability among professional users and civilian enthusiasts alike. Accuracy with the CMMG Resolute MK4 .300 AAC Blackout is outstanding, thanks to the precision-engineered barrel and quality components throughout the rifle. The free-floating handguard eliminates barrel harmonics interference, allowing shooters to achieve tight groupings at extended distances. Users consistently report sub-MOA performance when paired with quality ammunition and proper technique. The .300 Blackout cartridge itself is renowned for its ability to maintain supersonic or subsonic velocities, making the Resolute MK4 exceptionally versatile. Recoil management in the CMMG Resolute MK4 .300 AAC Blackout is notably manageable compared to larger caliber platforms, allowing for faster follow-up shots and improved shot placement. The direct impingement system distributes recoil impulses smoothly, and the adjustable stock helps users dial in the perfect fit for their shooting style. Whether you’re conducting tactical drills or precision target work, the Resolute MK4 .300 delivers the control you need to perform at your highest level. Intended Use & Applications The CMMG Resolute MK4 .300 AAC Blackout is purpose-built for tactical professionals, military personnel, law enforcement, and civilian shooters who require a compact, reliable rifle platform. The 16.1-inch barrel length makes the Resolute MK4 .300 ideal for close-quarters combat, vehicle operations, and confined spaces while maintaining sufficient barrel length for optimal .300 Blackout performance. This rifle excels in home defense scenarios, providing enough power and controllability for responsible firearm ownership. Many operators choose the Resolute MK4 .300 for its balance of firepower and maneuverability. Hunters and sport shooters appreciate the CMMG Resolute MK4 .300 AAC Blackout for its adaptability to various hunting situations and competitive shooting disciplines. The .300 Blackout cartridge is particularly effective for medium-sized game, and the rifle’s ergonomic design allows hunters to maintain comfort during long days in the field. The modular nature of the AR platform means the Resolute MK4 .300 can be customized with different optics, stocks, and accessories to match specific hunting conditions. Competition shooters value the rifle’s accuracy and reliability in tactical rifle matches and 3-gun competitions. Target shooters and precision enthusiasts find the CMMG Resolute MK4 .300 AAC Blackout to be an excellent platform for developing marksmanship skills and exploring the full potential of the .300 Blackout cartridge. The rifle’s stability and accuracy make it suitable for benchrest shooting, distance challenges, and informal range sessions. Owners often invest in quality optics and ammunition to maximize the capabilities of their Resolute MK4 .300, resulting in exceptional performance at extended ranges. AR rifles like this one offer the flexibility to grow with your shooting interests and skill development. Why Buy From CaliperDepot? CaliperDepot is your trusted source for premium firearms, ammunition, and tactical equipment, offering competitive pricing and fast, reliable shipping to your door. We maintain extensive inventory of popular models like the CMMG Resolute MK4 .300 AAC Blackout, ensuring quick order fulfillment and minimal wait times. Our knowledgeable customer service team is available to answer questions about specifications, legal compliance, and product recommendations. We’re committed to providing a seamless shopping experience with transparent pricing and up-front communication about availability and delivery timelines. When you purchase from CaliperDepot, you’re buying from a retailer that prioritizes customer satisfaction and product quality. We work directly with manufacturers to source authentic, factory-new firearms and components, guaranteeing you receive genuine CMMG products backed by manufacturer warranties. Our secure checkout process and discreet shipping protect your privacy while our FFL compliance procedures ensure all firearms are legally transferred according to federal and state regulations. Shop with confidence knowing CaliperDepot handles your order with the professionalism and attention to detail you deserve. The CMMG Resolute MK4 .300 AAC Blackout is a sophisticated rifle that demands a knowledgeable, professional retailer, and that’s exactly what you’ll find at CaliperDepot. We pride ourselves on our reputation for integrity, competitive pricing, and exceptional customer service in the firearms community. Order your Resolute MK4 .300 from CaliperDepot today and experience the difference that a dedicated firearms retailer can make in your shopping experience. With our commitment to fast shipping, in-stock inventory, and customer-focused service, purchasing your next rifle has never been easier or more reliable.