The CMMG Endeavor in 5.56x45mm NATO (brand part no. 55AFDF3-AB) is a semi-automatic AR-platform rifle built on CMMG Mk4 platform around an 18-inch, nitride-finished 416 stainless steel barrel, giving long-range shooters and hunters enhanced ballistic performance from one of the most popular AR15 calibers available. CMMG fits the Endeavor with a Magpul MOE rifle stock, a ZEROED muzzle brake, and the EML 15 M-LOK handguard, and builds it to accept custom trigger groups and virtually any other AR15-compatible component. Among AR-platform rifles in the AR rifles category, the Endeavor favors marksmen who want long-range performance with every part selected for utility.

Key Specifications

• Chambered in 5.56x45mm NATO.
• Built around an 18-inch, nitride-finished 416 stainless steel barrel.
• Built on CMMG Mk4 AR15 platform.
• Fitted with a Magpul MOE rifle stock.
• Fitted with a ZEROED muzzle brake.
• Wears the EML 15 M-LOK handguard.
• Handguard has M-LOK slots at 12, 3, 6, and 9 o-clock plus Picatinny rail sections.
• Accepts custom trigger groups and other AR15-compatible components.
• Operates as a semi-automatic AR-platform rifle.

Frequently Asked Questions

What barrel does this rifle use? An 18-inch, nitride-finished 416 stainless steel barrel for enhanced ballistic performance.

What stock and muzzle device are included? A Magpul MOE rifle stock and a ZEROED muzzle brake.

Can the trigger be swapped? Yes, this Endeavor accepts custom trigger groups.

Buy the CMMG Endeavor 5.56, 18-Inch

Long-range performance with every part selected for utility is exactly what the Endeavor delivers. Order it from our Lubbock, Texas gun shop for fast, insured shipping to your FFL.