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CMMG Gunbuilder's AR-15 Lower Parts Kit with Bullet Button

  • CMMG Gunbuilder's AR-15 Lower Parts Kit (CA Compliant) (CMG-55CA6D2)

CMMG Gunbuilder's AR-15 Lower Parts Kit with Bullet Button

Product Code:
Calculated at checkout
$59.95 $49.95
Out of Stock

Out of Stock

MPN: 55CA6D2


  • Takedown Pin
  • Receiver Pivot Pin
  • Takedown Pin Detent X 2
  • Takedown Pin Detent Spring X 2
  • Bolt Catch
  • Bolt Catch Plunger
  • Bolt Catch Spring Pin
  • Bolt Catch Spring
  • Buffer Retainer
  • Buffer Retainer Spring
  • Hammer Pin
  • Trigger Pin
  • Magazine Catch
  • Magazine Catch Spring
  • Bullet Button
  • Bullet Button Nut
  • Safety Selector
  • Selector Detent
  • Selector Detent Spring

Does not include the following parts:

  • Pistol Grip
  • Pistol Grip Screw and Washer
  • Trigger and Hammer
  • Trigger and Hammer Springs
  • Disconnect
  • Disconnect Spring
  • Trigger Guard and Roll Pin

**Fits all Mil-Spec AR-15 / M4 lower receivers.


Building an AR-15 in California can be difficult due to the stringent gun regulations, but CMMG has just made it much easier with the Gunbuilder's Lower Parts Kit with Bullet Button.

This kit includes the bullet button magazine release. The parts in this kit are of top quality. All pins and screws are designed to fit perfectly with no gunsmithing necessary. Plus, this lower parts kit comes without the parts that you will most likely replace with aftermarket upgrades right away, such as pistol grip, pistol grip screw and washer, trigger, hammer, trigger guard, etc. This means you won't have to waste money on parts that you'll have to toss out. This kit is the perfect way for you to complete your custom build AR-15!

Write Review

  1. Perfect LPK for my build 5 Star Review

    Posted by on 13th Jun 2016

    Love this LPK. It comes with everything I needed for my custom build.

  2. missing parts 1 Star Review

    Posted by on 17th Mar 2016

    I was excited about this product for my 1st build. While putting up together, noticed missing some parts. The safety selector switch spring and detent are missing. Apparently, this is not the 1st time happened to CMMG LPK product. Googled it and found on some website, they are missing same parts.

  3. CMMG lower parts kit-Ca compliant 5 Star Review

    Posted by on 28th Sep 2015

    Wing Tactical shipped my order SUPER fast, and this was the lowest price I could find for this kit. I am very happy with the quality of the CMMG parts, and will continue do do business with Wing Tactical.

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