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LR-308 Lower Build Kit | Lower Parts Kit | Stock & Buffer Tube Assembly

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So you've milled out and drilled the holes in your LR-308 lower. By now, you've done your research, and you've learned there's a difference between Colt's AR-10 and everybody else's LR-308. You've also learned that unfortunately most all the .308 parts on the market are titled AR-10, and you wanna save the hassle of trying to figure out which parts you need to make it work. Look no further.

We've thrown together this kit to help you take the guess work out of matching parts to your LR-308 lower. We've given you a correct fitting lower parts kit and a stock and buffer tube assembly fitted for the LR-308 platform. Happy building.

Quality and Performance, Priced Right

The quality control on this LPK's internals is second to none. Inside you’ll find a disconnector, hammer hook, and sear that were cut and polished to break as clean as glass at 4.5 pounds. The trigger affords perfect reset after every pull, with no break-in required. Every roll pin presses easily, while the hammer and trigger pins glide in with little effort.

LR-308 Lower Build Kit + Pistol Grip

This LR-308 Lower Parts Kit includes these components required for assembling your LR-308 stripped lower receiver:

  • Bolt Catch
  • Bolt Catch Plunger
  • Bolt Catch Roll Pin
  • Bolt Catch Spring
  • Buffer Retainer
  • Buffer Retainer Spring
  • Disconnector
  • Disconnect Spring
  • Steel Hammer
  • Hammer Pin
  • Hammer Spring
  • Magazine Catch
  • Magazine Catch Button
  • Magazine Catch Spring
  • Pistol Grip (A2 style)
  • Pistol Grip Lock Washer
  • Pistol Grip Screw
  • Pivot Pin
  • Pivot Pin Detent
  • Pivot Pin Detent Spring
  • Selector
  • Selector Detent
  • Selector Detent Spring
  • Takedown Pin
  • Takedown Pin Detent
  • Takedown Pin
  • Detent Spring
  • SSteel Trigger
  • Trigger Guard
  • Trigger Guard Roll Pin
  • Trigger Pin
  • Trigger Spring

Complete Your .308 Build

In addition to this build kit, you will need to purchase a barreled upper receiver assembly, or build one yourself using our available upper AR parts.

Easy-to-Follow Install Instructions

Check out our in-depth instructional and picture guide. It shows the full LPK assembly with tips and tricks, including tools required and the buffer tube and castle nut install.

To make your installation easy, we strongly recommend buying an Armorer's Wrench (required for the buffer tube's castle nut) and a set of roll pin punches.




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 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.

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

.308 Winchester
6.5 Creedmoor

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.