MPN: G2-K421-D000-0P / G2-K421-A000-0P


  • Made in the U.S.A.
  • Stainless steel trigger group
  • Raw stainless steel trigger group version comes with a Low mass speed hammer for lock time reduction


  • AR-15 lower receiver


  • 1x Takedown Pin
  • 1x Receiver Pivot Pin
  • 2x Takedown Pin Detent
  • 2x Takedown Pin Detent Spring
  • 1x Bolt Catch
  • 1x Bolt Catch Plunger
  • 1x Bolt Catch Spring Pin
  • 1x Bolt Catch Spring
  • 1x Buffer Retainer
  • 1x Buffer Retainer Spring
  • 1x Hammer
  • 1x Trigger
  • 1x Hammer Pin
  • 1x Trigger Pin
  • 1x Hammer Spring
  • 1x Trigger Spring
  • 1x Disconnetor
  • 1x Disconnetor Spring
  • 1x Magazine Catch
  • 1x Magazine Catch Spring
  • 1x Magazine Release Button
  • 1x Safety Selector
  • 1x Selector Detent
  • 1x Selector Detent Spring
  • 1x A2 Style Pistol Grip
  • 1x Pistol Grip Screw and Washer
  • 1xTrigger Guard and Roll Pin


When you build a new rifle, there are dozens of things to consider, and the cost of a build can get out of hand before you know it. Fortunately, Anderson Manufacturing has an answer. Anderson offers the small arms community AR components and parts kits at prices that can help keep you out of the dog house while completing your build on schedule. If you need a lower parts kit that furnishes everything you need to complete your lower receiver, but you have to pay attention to the bottom line, Anderson has your back with the Anderson LPK.

Everything You Need Without the Gimmicks

When its time to look for AR parts for a project its far too common for a builder to find himself buried in promises and propaganda. Everywhere you turn there’s another manufacturer who’s promising the world for just a few dollars more than the last guy, but he had already blown the budget entirely. Stop the madness. The Anderson Manufacturing lower parts kit includes everything you need to finish a lower build without promising to cure a common cold. From takedown pins to the pistol grip, it’s all here, at a better price than so many of the others. No, the Anderson Lower Parts kit doesn’t “feature” the incredible in the skin turnip twaddler, but you didn’t want it anyway. All you need is solid parts that do the work, and an Anderson Manufacturing Lower Parts Kit fills that need without the flash.

Two Options No Glitter Included

The Anderson LPK offers two options: choose a kit with black finished stainless steel trigger group parts, or one with raw stainless parts. If you choose the raw stainless option your it will include a low mass hammer, while the black finished trigger group comes with a standard mass hammer. Whichever way you go, when you choose an Anderson lower parts kit, you’ll find yourself with all the pieces you need to assemble your lower and a price tag you can live with. Then you can get it together and go to the range. After all, it’s more fun to shoot than count pennies going into the “build fund.”

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