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



So you've procured your .308 lower receiver, and now you need to build the rest of your LR-308.  The problem is, you haven't ordered any of the rest of the parts yet, because you've seen them called both LR-308 parts and AR-10 parts, and you don't know which ones you need.  Are these names interchangeable?  Nope.  They're different.  But don't worry, we've taken the guesswork out of acquiring the parts you need to finish off that lower into a fully completed lower assembly.

To do that, we've put together this kit.  You get everything you need to finish the entire lower half of your LR-308.  You get an LR-308 compatible lower parts kit made by CMMG, who's known as one of the industry's standards for small parts.  You also get a butt stock assembly, which consists of the buffer tube, buffer, castle nut, receiver end plate, buffer spring, and butt stock.  There.  Now you don't have to figure out what you need to finish the lower half of your LR-308.  It's simple.  You need this kit.

CMMG .308 Lower Parts Kit

CMMG has long been known as one of the standards for parts in the AR building community.  Their parts are of super quality and can easily be picked out by the color-coded bags they use to package their lower parts kits.  This color coding helps during the building process by letting you know what's what and where it goes in your lower receiver.

Your complete .308 lower parts kit includes:

Clear Bag
  • Pivot Pin
  • Pivot Pin Detent
  • Pivot Pin Detent Spring
  • Takedown Pin
  • Takedown Pin Detent
  • Takedown Pin Detent Spring
Yellow Bag
  • Bolt Catch
  • Bolt Catch Plunger
  • Bolt Catch Roll Pin
  • Bolt Catch Spring
  • Buffer Retainer
  • Buffer Retainer Spring
Red Bag
  • Hammer Pin
  • Hammer Spring
  • Trigger Pin
  • Trigger Spring
  • Disconnect
  • Disconnect Spring
Blue Bag
  • Magazine Catch
  • Magazine Catch Spring
  • Magazine Release Button
Green Bag
  • Safety Selector
  • Selector Detent
  • Selector Detent Spring
  • Pistol Grip Lock Washer
  • Pistol Grip Screw
No bag
  • Hammer
  • Pistol Grip
  • Trigger
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

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

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.