All barrels wear, become less accurate with time, and gradually break down. So give your next LR-308 build the chance it deserves to maintain its accuracy as long as it possibly can. And with this side-charging LR-308 build kit, you can do it without having to resort to going full-on with a heavy-profiled barrel.
This side-charging LR-308 build kit starts with an 18-inch Heavy barrel. It's paired with a 15-inch free-floating M-Lok handguard. You also get a 6-position buffer tube assembly and the butt stock to install onto it. This kit also comes with a standard 308-sized lower parts kit. All you need to do is finish your 80% lower receiver, which you can find here. Then, get the backup sights or optic of your choice, and you're ready to build. And once you snag some mags and ammo, you're in business.
What’s Included
This kit is not a firearm. It includes an assembled upper receiver, bolt carrier group, and charging handle. It does not include a lower receiver or any lower components.
.308 AR Upper Assembly Specs
Barrel
- Chamber: .308 Winchester
- Profil: Heavy Barrel
- Length: 18”
- Twist Rate: 1:10
- Gas System: Mid-length
- Gas Port Barrel Dia: 0.086”
- Muzzle Threads: 5/8x24
- Material: 4150 Chrome Moly Vanadium
- Finish: Parkerized (Black)
- Process: Button Rifled
- Lining: Stainless
- Muzzle: A2-style "birdcage"
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 not 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.
80-Lower.com only ships within the United States. Federal legislation dictates we cannot ship our products internationally.
- Platform:
- AR10
- Caliber:
- .308 Winchester
- Barrel Size:
- 18"
- Barrel Finish:
- Nitride
- Twist Rate:
- 1/10
