CMMG Endeavor 22 ARC 20" 28B3D0CCG

CMMG ENDEAVOR — 22 ARC, 20" Barrel (Model 28B3D0CCG) Brand: CMMG • Series: ENDEAVOR • Caliber: 22 ARC (Advanced Rifle Cartridge) • Barrel Length: 20 inches • Platform: AR-15 precision rifle • Intended Role: Varmint/predator, practical precision, long-range training • Model/SKU: 28B3D0CCG • UPC: 810148627409 Meet the next evolution of AR-15 precision. The CMMG ENDEAVOR 22 ARC with a 20" barrel is purpose-built to exploit the 22 ARC cartridge’s flat trajectory, high BC projectiles, and excellent wind performance—delivering long-range capability in a lightweight, familiar AR package. Whether you’re stacking coyotes at extended distances, ringing steel to 800+ yards (shooter and conditions dependent), or building a crossover gun for match training, ENDEAVOR gives you the stability, ergonomics, and accuracy potential the 22 ARC demands. Why 22 ARC in the ENDEAVOR Platform? High-BC .224 bullets, low recoil: The 22 ARC was engineered for heavy-for-caliber projectiles and long, efficient ogives. You get impressive downrange energy and less wind drift with softer recoil than larger calibers—perfect for staying on target. AR-15 length with long-range legs: Enjoy the handling and accessories of a standard AR-15 while pushing performance more commonly associated with larger cartridges. Feed system synergy: The 22 ARC uses a 6.5 Grendel/6mm ARC–type bolt face and runs best in Grendel-pattern magazines—a proven recipe for reliable cycling with long, sleek bullets. 20" barrel sweet spot: The extended tube maximizes velocity and consistency, offering a forgiving node window for factory loads and handloads alike. Key Features & Specs Caliber: 22 ARC (optimized for heavy .224" bullets and long COAL) Barrel: 20-inch precision barrel (twist commonly optimized for 75–88+ grain bullets) Action: AR-15 direct-impingement style operation (standard controls, simplified maintenance) Handguard: Free-floated M-LOK® compatible rail for rigid accessory mounting without affecting barrel harmonics Receiver Set: AR-15 pattern with precision fit (compatible with common mil-spec accessories) Furniture/Controls: Ergonomic grip, adjustable stock, and modern ambi/expanded controls typical of the ENDEAVOR line Muzzle: Threaded for common .22-caliber muzzle devices/suppressor mounts* Magazine Interface: 6.5 Grendel-pattern magazines recommended for best reliability Model/SKU: 28B3D0CCG • UPC: 810148627409 *Always verify exact thread pitch and included muzzle device in your specific package contents. What Sets the ENDEAVOR Apart Free-float accuracy: A rigid, free-floated handguard keeps support pressure off the barrel for more consistent POI from bags, bipods, and barricades. Balance and control: The 20" barrel and extended sight radius stabilize your hold for prone, tripod, or positional stages. Ready for glass & gadgets: Continuous top rail space for optics and clip-on devices; M-LOK slots for bipods, QD sling cups, and laser/illumination. Gas-gun practicality: Faster follow-ups and less shooter fatigue than comparable bolt guns—great for high-volume varmint hunts and training days. Ideal Use Cases Predator & Varmint: Leverage high-BC .224 bullets to stretch coyotes and prairie dogs with laser-flat trajectories. Gas-Gun Precision/PRC Training: Practice wind calls and positional shooting with AR ergonomics and economical recoil. Ranch & Property Management: Lighter carry weight than big-frame ARs with the reach needed for open country. Suppressor-Friendly Builds: The 22 ARC pairs well with modern .22-cal suppressors/mounts for recoil and blast reduction.* *Confirm barrel thread, suppressor bore compatibility, and local laws. Setup Tips for Best Results Magazines: Use quality 6.5 Grendel-pattern mags for optimal 22 ARC feeding—especially with long OAL bullets. Optics: A 2–12x, 3–15x, or 4–16x FFP scope with reliable tracking and a usable wind reticle is a perfect match. Support Gear: Run a cant-adjustable bipod and rear bag for prone; add an ARCA plate if you shoot off tripods. Ammo Selection: The 22 ARC shines with 75–88+ grain bullets; test a couple of factory loads to find your rifle’s sweet spot. Gas & Buffer Tuning: If you change muzzle devices or run suppressed, consider gas adjustment and buffer tuning for optimal ejection and minimal recoil impulse. Maintenance & Ownership Break-in & Clean: Follow CMMG’s barrel break-in guidance; keep the free-float rail and gas system clean for consistent groups. Torque & Threadlocker: Verify scope ring/base torque and M-LOK fasteners; apply medium threadlocker where appropriate. Round-Count Tracking: Log round count and environmentals; 22 ARC data translates well across seasons for repeatable dope. SEO Highlights (Copy & Paste) CMMG ENDEAVOR 22 ARC 20" precision AR-15 rifle Long-range .224 caliber performance with high-BC bullets and low recoil Free-float M-LOK handguard, AR-15 ergonomics, suppressor-ready muzzle Runs best with 6.5 Grendel-pattern magazines for reliable feeding Model 28B3D0CCG • UPC 810148627409 Frequently Asked Questions Q: What magazines should I use for 22 ARC? A: 6.5 Grendel-pattern AR-15 magazines provide the most reliable feeding with the 22 ARC’s case geometry and long bullet profiles. Q: What bullet weights work best? A: The cartridge is optimized for 75–88+ grain .224 bullets, offering excellent downrange ballistics and wind resistance. Q: Is the 20" barrel good for long range? A: Yes. A 20" tube balances velocity and handling, giving the 22 ARC the speed it needs while keeping the rifle lively. Q: Can I run a suppressor? A: Most ENDEAVOR barrels are threaded for common .22-cal devices. Confirm thread pitch and ensure your suppressor is rated for .224 high-velocity cartridges. Q: Is this a standard AR-15? A: It uses AR-15 receivers and controls with a Grendel-type bolt and magazines suited to the 22 ARC case head and OAL. Precision without the Punishment The CMMG ENDEAVOR 22 ARC 20" (28B3D0CCG, UPC 810148627409) delivers long-range performance, soft recoil, and AR-15 familiarity in a single package—perfect for predators, prairie dogs, and practical precision practice. Mount quality glass, feed it high-BC .224 bullets, and watch your hit percentage climb. The End