Are you ready to step up your .308 long-range game? Then snatch up this LR-308 upper assembly. This upper assembly provides an 18" mid-weight SOCOM-profiled barrel made from button-rifled 4150 CMV for utter accuracy.
It also comes with a 15" M-Lok handguard for mounting a bipod, foregrip, or whatever else. All you'll need after assembly is either backup sights or optic of your choice, mags, and ammo. Get serious about your .308 shooting. Get this kit and start reaching out to 600, 700, or 800 meters.
What’s Included
This is not a firearm. It includes an assembled upper receiver, bolt carrier group, and charging handle.
LR-308 Upper Assembly Specs
Barreled uppers are assembled in-house before shipment
- Chamber: .308 Winchester
- Contour: Heavy Barrel
- Length: 18”
- Twist Rate: 1:10
- Gas System: Rifle
- Gas Port: 0.750”
- Muzzle Threads: 5/8x24
- Material: 4150 CMV
- Finish: Parkerized
- Process: Button Rifled
- Lining: None
- Muzzle: Twisted A2 “Birdcage” Flash Hider
Handguard
- Attachment System: 15" M-Lok Free-Float
- Finish: Type III Hardcoat Anodized (Mil-Spec)
- Top Rail: M1913 Picatinny
- Material: Billet 6061-T6 Aluminum
- Attachment: Barrel Nut
Upper Receiver
- Profile: .308 Flattop w/ Picatinny
- 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, Chrome-lined
- Charging Handle: Included
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.
GunBuilders.com only ships within the United States. Federal legislation dictates we cannot ship our products internationally.
