LR-308 Rifle Kit - 20" Stainless Barrel, 1:10 Twist & 15" M-Lok Handguard with Fire/Safe Marked 80% Lower



Finally, we have build kits in the .308WIN (7.62 x 51mm) caliber.  This LR-3o8 build is just what you need to introduce this caliber into your growing AR rifle collection. This kit's upper assembly gives you a 20" nitride-coated barrel with a 15" handguard that has M-Lok attachment points running its entire length.  Mount a bipod, foregrip, backup sights, or whatever else you choose.

Please note:  this kit will create an LR-308 rifle, and not an AR-10, which is a design proprietary to Colt only.  But that's the good part.  The vast majority of .308-sized AR parts out there are made for the LR-308 / SR-25 platform.  Just be sure that any accessories you get for this bad boy are compatible.

LR-308 Rifle Kit Specs:

Barrel Length: 20"

Barrel Profile: Light contour

Gas System: Rifle-length

Barrel Steel: 416R, match-grade

Barrel Finish: Stainless

Chrome Lining: N/A

Muzzle Thread: 5/8-24

Chamber: .308 Winchester 

Twist Rate: 1:10

Diameter at Gas Block: 0.125

Gas Block Type: Low-profile

Muzzle Device: .308 Shark Muzzle Brake

Receiver Material: Forged 7075 T6

Receiver Type: Low-profile w/ Picatinny

Handguard Type: Custom, super-slim 15” M-Lok

Bolt Carrier Group Included: Yes

Bolt Steel: Shot-peened, MPI-tested 9310

Bolt Carrier Profile: M16 Full-auto

Charging Handle Included: Yes

LR-308 Rifle Kit Features:

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

Barrel: Stainless steel, match-grade 20”, chambered in .308 Winchester. Made of 416R stainless. Features 1:10 twist rate and rifle-length gas system. Includes custom 15” slant M-Lok handguard, .125" diameter low profile gas block, and .308 Shark Muzzle Brake.

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

Bolt: Mil-spec, M16 full-auto. Shot-peened, made of 9310 steel. Includes 8620 gas carrier.

80% Lower: Complete with an optional 80% lower. All lowers include mil-spec fittings and hard-coat anodizing.

Lower Parts Kit: Includes mil-spec CMMG lower parts kit. Features six-position M4 buttstock, shorty buffer tube, and .308 buffer.

Charging handle: Standard 7075 Forged charging handle.

Please note: If completing your LR-308 build using the optional 80% lower, please select an 80 lower jig from our available options.

No FFL required  Made in the USA  Lifetime Warranty

Shipping Restrictions only ships within the United States. Federal legislation dictates we cannot ship our products internationally. 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 (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. We try our best to keep our shipping page current, but laws change daily.

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, 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.