LR-308 Side-Charging Rifle Kit – 20” Black Nitride, Straight Fluted, SOCOM Barrel, 1:10 Twist Rate with 15” M-Lok Handguard

Want an LR-308 that looks as good as it performs? Want to develop that “extension of yourself” level of familiarity that only building it yourself could grant you? Get your zen on with this LR-308 build kit, with a black nitride barrel that’s been given straight fluting to show that attention-getting stainless steel underneath.

This side-charging LR-308 build kit comes with a pre-built side-charging upper assembly that features a 20-inch black nitride straight-fluted SOCOM Barrel paired with a 15-inch free-M-Lok floating handguard. You also get the rear end of your rifle, the 6-position buffer tube assembly and butt stock. And of course, you get a standard lower parts kit. And once you complete your LR-308 (DPMS gen 1 patterned) 80% lower, you just build it, and mount the backup sights or optic of your choice. Then you just grab some mags and ammo, and become one with your inner shooter.

What’s Included

This kit is not a firearm. It includes an pre-built upper receiver, bolt carrier group, lower parts kit, and buffer assembly with buttstock.

Here’s the beginner’s guide to 80% lowers.

.308 AR Rifle Kit Specs

Barrel

• Chamber: .308 Winchester
• Contour: SOCOM
• Length: 20”
• Twist Rate: 1:10
• Gas System: Rifle-length
• Gas Port Barrel Dia: 0.076”
• Muzzle Threads: 5/8×24
• Material: 416R Stainless Steel
• Finish: Stainless Steel with Black Nitride
• 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: Phosphate Coating
• Interior: Chrome-Lined
• Gas Key: Staked, Chrome-lined
• Charging Handle: Included

Lower Receiver Parts

• Buffer System: Mil-spec, .308 “Shorty” Buffer
• Buttstock: Mil-spec, M4-type
• Parts Kit: Mil-spec, single-stage

Lower receiver sold separately. 

WARNING: Handling firearms parts and certain firearm 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, visit www.P65Warnings.ca.gov 

Shipping Restrictions 

We cannot ship certain parts and accessories to states that prohibit the sale or ownership of such components, like California, New York, and others. Before ordering, see our shipping restrictions for a list of all prohibited states and locales. We try our best to keep our shipping restrictions current, but state laws change almost daily. It is your responsibility to be aware of your local firearms laws before purchasing from our website or machining a firearm. 

80-Lower.com only ships within the United States. Federal law prevents international shipments of our products.