Build your LR-308 rifle with this upper assembly, and then really stretch out with your shots fired and go the distance. This build kit comes with a 20" match barrel made of 416R stainless steel, so you can count on it lasting the entire life of your LR-308.
A custom, free-float M-Lok handguard with low-profile gas system improves accuracy and provides plenty of rail estate for your favorite accessories and attachments.
What’s Included
This is not a firearm. It includes an assembled upper receiver, bolt carrier group, and a charging handle.
.308 AR Upper Assembly Specs
Barreled uppers are assembled in-house before shipment.
Barrel
- Chamber: .308 Winchester
- Contour: Mid-weight
- Length: 20”
- Twist Rate: 1:10
- Gas System: Rifle
- Gas Port Barrel Dia: 0.125”
- Muzzle Threads: 5/8x24
- Material: Match-Grade, 416R Crucible Stainless
- Finish: Stainless
- Process: Button Rifled
- Lining: Stainless
- Muzzle: Twisted SS Flash Hider
Handguard
- Attachment System: 15" M-Lok
- Finish: Type III Hardcoat Anodized (Mil-Spec)
- Top Rail: M1913 Picatinny
- Material: Billet 6061-T6 Aluminum
- Attachment: Barrel Nut
Upper Receiver
- Profile: LR-308 Flattop
- Material: Forged 7075-T6 Aluminum
- Finish: Type III Hardcoat Anodized (Mil-Spec)
Bolt Carrier Group
- Profile: M16/Full-Auto
- Steel: 9310 Tool, HPT/MPI-tested
- Exterior: Black Nitride
- Interior: Parkerized
- Gas Key: Staked
- Charging Handle: Included
Lower receiver sold separately.
WARNING: Handling firearms parts and accessories can expose you to lead and other petroleum products known to the State of California to cause cancer and reproductive harm. For more information go to: www.P65Warnings.ca.gov
Shipping of various parts and/or accessories are prohibited to states and locales (ie New Jersey, California, New York, etc…) with restrictions against certain parts and/or accessories or "assault weapons" (i.e. states with high-capacity magazine restrictions, manufacturing of semi-automatic weapons, etc..). It is your responsibility to be aware of your local firearms laws before purchasing from our website or machining a firearm. We try our best to keep our shipping page current, but laws change daily.
80-Lower.com only ships within the United States. Federal legislation dictates we cannot ship our products internationally.
- Plaform:
- AR10
- Caliber:
- .308 Winchester
- Barrel Size:
- 20"
- Barrel Finish:
- Stainless
- Twist Rate:
- 1/10
