CMMG 60B8618 Endeavor 100 MK4 Upper Group 6mm ARC 20" Black Nitride 416R Stainless Steel

Action: 6mm ARC
Caliber: None, Optic Ready
Barrel Length: 20"
Capacity: 416R Stainless Steel
Hammer Style: 1:7.50"
Grips: Medium Taper
Sights: Black Nitride
Frame Description: Black Hard Coat Anodized
Frame Size: CMMG RML15 M-LOK
Barrel Length Range: 20" to 21.99"