LR-308 Rifle Kit - .308WIN (20" Nitride Barrel & 18" M-Lok Handguard) w/ 80% Lower



Mastered the AR-15?  Good.  Now move onto an AR platform long gun that's a bit more of a beast.  Check out one of the very first additions to our catalog of LR-308 build kits! This kit gets you an upper assembly made from a 20" nitride-coated barrel and a 18" M-Lok handguard.  You also get a buffer tube assembly and butt stock kit, lower parts kit, and one of our LR-308 80% lower receivers.  All you need are backup sights or an optic of your choice, mags, and ammo.  Please note, this build kit will yield an LR-308, meaning it is compatible with any .308 parts that follow the DPMS gen 1 pattern, and not Colt (AR-10).

LR-308 Rifle Kit Specs:

Barrel Length: 20"

Barrel Profile: Light contour

Gas System: Rifle-length

Barrel Steel: 4150 CMV, match-grade

Barrel Finish: Nitride

Muzzle Thread: 5/8-24

Chamber: .308 Winchester 

Twist Rate: 1:10

Diameter at Gas Block: 0.750”

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 18” 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 4150, nitride-coated 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: Nitride-coated, match-grade, 20”, chambered in .308 Winchester. Made of 4150 CMV steel. Features 1:10 twist rate and rifle-length gas system. Includes custom 18” slant M-Lok handguard, 0.750" 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

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.