The CMMG Endeavor 100 MK4 Rifle in 6mm ARC: Precision, Extended Range, and Versatile Applications

The CMMG Endeavor 100 MK4 rifle, specifically model 60A8653 chambered in the versatile 6mm ARC, represents a pinnacle of modern sporting rifle design, optimized for precision, extended range, and versatile applications. This rifle is an ideal choice for a diverse array of shooters, from dedicated long-range enthusiasts and competitive marksmen to ethical hunters seeking a potent yet manageable cartridge for medium-sized game. If you've been asking questions like "What is the best AR-platform rifle for long-range precision shooting?" or "Which rifle offers superior ballistic performance for hunting from an AR-15 frame?", the CMMG Endeavor 100 MK4 6mm ARC is a compelling answer.

Unlocking Long-Range Potential with 6mm ARC

At the heart of the CMMG Endeavor 100 MK4's appeal is its chambering in 6mm ARC (Advanced Rifle Cartridge). Developed by Hornady, the 6mm ARC was engineered from the ground up to deliver unprecedented ballistic performance from an AR-15 platform. It bridges the gap between smaller varmint cartridges and larger, heavier calibers, offering a superb balance of velocity, energy, and accuracy.

Why choose 6mm ARC? For shooters looking to extend their effective range without stepping up to a heavier, larger-framed AR-10 style rifle, the 6mm ARC is a game-changer. It launches high ballistic coefficient (BC) projectiles, typically ranging from 103 to 108 grains, at impressive velocities, maintaining supersonic flight and energy well past 1000 yards in many configurations. This makes it a formidable option for precision target shooting, where tight groups at distance are paramount, and for ethical hunting, providing ample energy for deer, hogs, and similar medium-sized game. The cartridge is renowned for its flat trajectory and minimal wind drift, significantly simplifying holdovers and wind calls for long-range engagements.

Designed for Discerning Shooters: Who Benefits from the Endeavor 100 MK4?

The CMMG Endeavor 100 MK4 in 6mm ARC is meticulously crafted for individuals who demand precision, reliability, and adaptability from their AR-platform rifle.

• Precision Target Shooters: If your goal is to consistently achieve sub-MOA groups and push your skills to extended distances, the 20-inch barrel and 6mm ARC chambering are a perfect match. The stable platform and ballistic capabilities allow for exceptional accuracy potential.
• Long-Range Enthusiasts: For those who frequent ranges exceeding 500 yards or engage in challenging steel target competitions at distance, this rifle offers the inherent accuracy and ballistic advantage needed to connect with targets reliably.
• Hunters Seeking an AR-Platform Edge: Hunters who prefer the ergonomics and modularity of the AR-15 platform but need a cartridge capable of ethical harvesting of medium game will find the 6mm ARC an outstanding solution. It provides more energy and better performance than traditional .223/5.56mm for these applications, while still being lighter and more manageable than larger AR-10s.
• Versatile Sporting Rifle Owners: If you need one rifle that can transition seamlessly from target practice to varmint control to deer hunting, the CMMG Endeavor 100 MK4 6mm ARC offers that unparalleled versatility.

This rifle solves the common dilemma of balancing maneuverability with long-range performance within the AR-15 framework, providing an answer for those who find .223/5.56mm insufficient for their long-range or hunting needs, but don't want the weight or cost of an AR-10.

Core Components and Engineering Excellence

CMMG is a name synonymous with quality and innovation in the AR platform market. The Endeavor 100 MK4 model 60A8653 exemplifies their commitment to building reliable, high-performing firearms.

• 20-inch Barrel for Optimal Performance: The 20-inch medium taper 416 stainless steel barrel, treated with a salt bath nitride (SBN) finish and featuring a 1:7.5" twist rate, is a critical component for maximizing the 6mm ARC's potential. This length allows the cartridge to achieve its maximum velocity, translating directly to flatter trajectories and increased energy on target, especially at extended ranges. The SBN finish enhances durability, corrosion resistance, and bore longevity, crucial for consistent accuracy over thousands of rounds. The 1:7.5" twist rate is specifically optimized to stabilize the heavier, high-BC projectiles commonly used in 6mm ARC, ensuring precise flight.
• Robust Receiver Construction: The receiver set is crafted from billet 7075-T6 aluminum, known for its exceptional strength-to-weight ratio. The black hard coat anodized finish provides superior resistance to abrasion, corrosion, and wear, ensuring the rifle maintains its appearance and integrity even under demanding conditions. This robust construction contributes significantly to the rifle's overall durability and reliability.
• CMMG EML15 M-LOK Handguard: The free-float M-LOK handguard offers ample space for mounting accessories such as bipods, lights, lasers, and other tactical gear, without interfering with barrel harmonics, which is essential for accuracy. Its sleek design and secure attachment system contribute to the rifle's modern aesthetic and functional versatility.
• A1 Fixed Stock: The inclusion of an A1 fixed stock provides a stable and consistent cheek weld, which is paramount for precise shot placement, especially at longer distances. Unlike adjustable stocks, a fixed stock eliminates any potential for wobble or movement, contributing to a more rigid and predictable shooting platform. This classic design is favored by many shooters for its simple reliability and ergonomic comfort.
• CMMG ZEROED Components: The rifle features CMMG's proprietary ZEROED line of accessories, including the ZEROED Muzzle Brake and ZEROED Pistol Grip. The muzzle brake is designed to significantly reduce recoil and muzzle rise, allowing for faster follow-up shots and improved target acquisition. The pistol grip is ergonomically designed for comfortable handling and enhanced control.
• Reliable Gas System: A rifle-length gas system ensures smooth and reliable cycling of the action, minimizing wear on internal components and contributing to the rifle's long-term durability. This system is optimally tuned for the 20-inch barrel and 6mm ARC cartridge, providing a balanced operation.

Performance and User Outcomes

When you invest in the CMMG Endeavor 100 MK4 6mm ARC, you're not just buying a rifle; you're acquiring a tool engineered for superior performance and specific, measurable outcomes:

• Exceptional Accuracy: Expect consistent sub-MOA accuracy with quality ammunition, empowering you to achieve tight groups and make precise hits at extended ranges. Many users report ½ MOA or better performance with factory match loads.
• Extended Effective Range: Confidently engage targets beyond 800 yards, and potentially out to 1000+ yards, depending on ammunition and shooter skill, thanks to the 6mm ARC's ballistic superiority.
• Reduced Recoil: The 6mm ARC, combined with the CMMG ZEROED muzzle brake, offers a remarkably mild recoil impulse for its ballistic performance, allowing for comfortable extended shooting sessions and quicker target reacquisition.
• Versatile Hunting Capability: Ethically harvest medium-sized game with confidence, leveraging the cartridge's energy and terminal performance. The 6mm ARC hits hard and performs reliably on deer, hogs, and similar animals within reasonable hunting distances.
• Durable and Reliable Operation: Built with high-quality materials and CMMG's stringent manufacturing processes, this rifle is designed for enduring reliability in diverse environments, from the range to the field.
• Effortless Maintenance: Like all AR-platform rifles, the CMMG Endeavor 100 MK4 is designed for straightforward disassembly and maintenance, ensuring longevity and consistent performance with proper care.

Considering Your Ammunition and Accessories

To fully leverage the capabilities of the CMMG Endeavor 100 MK4 6mm ARC, selecting the right ammunition and accessories is crucial. High-quality match-grade ammunition, such as Hornady's own 6mm ARC loads, will unlock the rifle's precision potential. For hunting, specific bullet constructions designed for terminal performance on game are recommended.

Complementary accessories might include:

• High-Quality Optic: A variable power scope with a capable reticle and clear glass is essential for precision shooting at distance. Consider models with ample elevation adjustment to fully utilize the 6mm ARC's reach.
• Bipod: For stable shooting from prone or bench positions, a sturdy bipod is invaluable.
• Sling: A comfortable and adjustable sling enhances carrying convenience and can aid in stable shooting positions.
• Cleaning Kit: Regular cleaning and proper maintenance are key to preserving the rifle's accuracy and longevity.

The CMMG Endeavor 100 MK4 6mm ARC is more than just a rifle; it's a precision instrument built to elevate your shooting experience. Its thoughtful design, coupled with the exceptional performance of the 6mm ARC cartridge, makes it a top-tier choice for anyone serious about long-range shooting, hunting, or simply owning a highly capable and reliable modern sporting rifle. This outstanding rifle is available at DEGuns, providing a trusted source for your firearms needs.

Key Specifications

Feature	Detail
Model	Endeavor 100 MK4
Caliber	6mm ARC
Barrel Length	20 inches
Capacity	10 + 1 Rounds
Finish	Black Hard Coat Anodized
Stock	A1 Fixed Stock
UPC/SKU	60A8653
Barrel Material	416 Stainless Steel, SBN
Handguard	CMMG EML15 M-LOK
Muzzle Device	CMMG ZEROED Muzzle Brake
Receiver	Billet 7075-T6 AL
Gas System	Rifle Length
Weight (Approx.)	7.5 lbs
Overall Length	Approx. 39.5 inches