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LR-308 Upper Assembly - 20" Stainless Steel Barrel, 1:10 Twist Rate with 17" MLOK Handguard

Usually ships the same day or the next business day!

Get back to basics. Learn what it means to be solely responsible for your rifle by building it yourself. Go for the .308 caliber by building an LR-308, and stretch your shooting out to longer ranges accurately than your typical AR-style rifle.

We're bringing you a no-nonsense upper assembly that when paired with a built LR-308 lower receiver, will yield you a solid and capable LR-308 rifle. You'll need a stripped lower receiver not included, then assemble it with the provided prebuilt upper assembly, then add your lower parts kit, and butt stock/buffer tube assembly. All you'll need to do after assembly is pick out a set of backup sights or optics of your choice and you are ready for the range.

LR-308 Upper Assembly Specs:

Barrel Length: 20"

Gas System: Rifle-length

Barrel Finish: Stainless

Muzzle Thread: 5/8x24

Chamber: .308 Winchester

Twist Rate: 1:10

Gas Block Type: Low-profile

Muzzle Device: A2 "Birdcage" Style Flash Hider

Receiver Type: Flat-top w/ Picatinny

Handguard Type: 17" Low-Profile MLOK Split-Rail

Bolt Carrier Group Included: Yes

Charging Handle Included: Yes

LR-308 Upper Assembly Features:

  • Compatible with all DPMS .308/LR-308 parts
  • Features 416R stainless steel barrel
  • Includes all the parts you need to build an LR-308
  • Not considered a firearm, no FFL required
  • Upper ships pre-built
  • Proudly made in the U.S.A.
  • Backed by Lifetime Warranty

Barrel: Stainless steel, 20”, chambered in .308 Winchester. Features 1:10 twist rate and rifle-length gas system. Includes 17” MLOK split-rail handguard, low profile gas block, and flash hider.

Upper: Mil-spec, made of forged 7075 T6 aluminum. Hard-coat anodized (Type III).

Charging handle: Standard 7075 Forged charging handle.

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:

Shipping Restrictions

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. only ships within the United States. Federal legislation dictates we cannot ship our products internationally.

.308 Winchester
Barrel Length:
Barrel Finish:
Stainless Steel
Twist Rate:
Handguard Type:
Handguard Length:
Gas System Length:

We are a national retailer of individual components and not all products depicted on this website are legal in every state. Shipping of various products found on this website are prohibited to some states (such as California, Connecticut, District of Columbia, Hawaii, New Jersey, New York, Rhode Island, and Washington). The information, pictures, text or products presented on this website are not a representation by us, and should not be understood by you, that any product or completed firearm is legal to assemble or own in your state of residence. We encourage each and every builder to perform their own research about the state and federal laws that apply to them. It is your responsibility to understand the law and we encourage you to consult with an attorney or your local ATF representative.