CMMG Endeavor Mk4 5_56x45mm Nato 18in Rifle 55AFDF3-SG

CMMG Endeavor Mk4 5.56x45mm Nato 18in Sniper Gray Rifle (55AFDF3-SG)

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  • CMMG Endeavor Mk4 5.56x45mm Nato 18in Sniper Gray Rifle (55AFDF3-SG)
  • CMMG Endeavor Mk4 5.56x45mm Nato 18in Sniper Gray Rifle (55AFDF3-SG)
  • CMMG Endeavor Mk4 5.56x45mm Nato 18in Sniper Gray Rifle (55AFDF3-SG)

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  • 5.56x45mm NATO caliber
  • Direct impingement operating system
  • 416SS, SBN barrel material
  • Rifle gas port location
  • Cmmg EML15 M-Lok hand guard
  • Magpul MOE Rifle stock
  • Mil-spec single stage trigger type
  • Zeroed parts and accessories - Quality comes standard
  • Cerakote standard finish
  • Lifetime Quality Guarantee

There's a world of options when it comes to AR15s, and for those that want to reach out to further targets or hunt with 5.56, the Cmmg Endeavor Mk4 5.56x45mm Nato 18" Rifle (55AFDF3) is an awesome choice. Despite all the different caliber offerings available today for AR15 pattern rifles, 5.56x45mm still stands as one of the most popular.

Built on Cmmg's Mk4 - AR15 platform, this ENDEAVOR can make use of just about any AR15 compatible component, like custom trigger groups, and utilizes a nitride-finished 18-inch 416 stainless steel barrel for enhanced ballistic performance.

Each Cmmg ENDEAVOR rifle is purpose-built for long-range performance, with everything from the Magpul MOE rifle stock to the ZEROED muzzle brake, and every part in between selected for its utility to the avid marksman.

The EML 15 handguard maximizes customization potential. M-LOK attachment slots at the 12, 3, 6, and 9 o'clock positions give you plenty of real estate to mount accessories, while the Picatinny rail sections allow for easy and solid mounting points for sights and accessories.

The AR15 platform is well known for its capability for customization but picking the right parts doesn't have to be a nightmare of homework. Cmmg's ZEROED parts and accessories are made here in the USA with quality and attention to detail that is second to none and each ENDEAVOR comes equipped with a slew of ZEROED parts standard, including: ZEROED Pistol Grip, ZEROED Trigger Guard, ZEROED 60 degrees /90 degrees Ambi Safety, ZEROED AR15 Ambi Charging Handle, ZEROED Ambi Mag Catch, ZEROED Extended Mag Release Button, ZEROED AR15 Bolt Catch, ZEROED AR15 Polymer Dust Cover, ZEROED Muzzle Brake 5.56mm.

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Warranty Information

Platform Mk4
Caliber 5.56x45mm NATO
Operating System Direct Impingement
Barrel Twist 1:7
Barrel Contour MT
Barrel Material 416SS, SBN
Muzzle Device Zeroed Muzzle Brake 5.56
Muzzle Thread 1/2 x 28
Gas Port Location Rifle
Gas Block 0.750" Non-Adjustable
Upper Receiver Billet 6061 T6 Aluminum
Lower Receiver Mk4 Forged 7075 T6
Hand Guard Cmmg EML15 M-Lok
Finish Cerakote Standard
Charging Handle Cmmg Zeroed Ambi
Pistol Grip Cmmg Zeroed Pistol Grip
Buffer Type AR15, Rifle / AI
Receiver Extension Cmmg A1 Extension
Stock / Brace Magpul MOE Rifle Stock
Trigger Type Mil-Spec Single Stage
Trigger Guard Cmmg Zeroed Trigger Guard
Safety Selector Cmmg 60/90 degree
Magazine Magpul 30rd Pmag
Barrel Length, in 18"
Length, in 37.8"
Weight, lbs 7
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Additional Information

Barrel Length:
5.56x45mm NATO
Capacity Rd.:
Sniper Gray
Product Type:
Serialized Item:
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