CMMG LR-308 Endeavor Mk3 Upper Receiver Assembly 308 Winchester 20″ Barrel M-LOK Handguard



The CMMG LR-308 Endeavor is for shooters and hunters who need to reach out to extended ranges. The Endeavor is built to maximize long-distance precision. The Endeavor features quality furniture and high-performance components to maximize your marksmanship. The Endeavor offers a forged 7075-T6-AL M4 upper receiver assembly with a bolt carrier group, and a Cerakoted receiver and handguard. The Endeavor is configured perfectly to suite your long-range needs.


  • Forged 7075-T6 AL M4 type upper receiver
  • Cerakoted Receiver and Hand Guard
  • Complete Bolt Carrier Group Included
  • CMMG Zeroed Ambidextrous Charging Handle


Made In United States of America


Product Information

Cartridge 308 Winchester
Color Armor Black
Finish Cerakote
Material Aluminum
Weight 7.4 Pound
Barrel Length 20 Inches
Twist 1:10 Inches
Threads 5/8″-24
Barrel Contour Heavy
Barrel Finish Black Salt Bath Nitride
Chrome Lined No
Gas Block Diameter 0.936 Inches
Gas System Length Rifle
Upper Receiver Type A3 Flat-Top
Barrel Material 416 Stainless Steel
Handguard CMMG EML15 M-LOK
Bolt Carrier Assembly Included Yes
Country of Origin United States of America
Compatible With
AR-10, LR-308

Delivery Information

Shipping Weight 7.955 Pounds
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