• Includes custom enhanced lower parts
    • Ambidextrous 45-degree / 90-desgree safety selector
    • Lightweight takedown and pivot pins
    • Stainless steel detents and buffer retainer
    • Stainless steel anti-walk pins
  • Compatible with most AR-15 lowers
  • Made in the U.S.A.


  • AR-15 lower receiver


  • 1x Ambidextrous 45/90 Safety Selector
  • 1x Bolt Catch
  • 1x Enhanced Takedown and Pivot Pins
  • 1x Stainless Steel Takedown detent
  • 1x Takedown Detent Spring
  • 1x Stainless Steel Pivot Detent
  • 1x Pivot Detent Spring
  • 2x Stainless Steel Anti-Walk Trigger/Hammer Pins
  • 1x Stainless Steel Buffer Retainer
  • 1x Magazine Catch
  • 1x Magazine Spring
  • 1x Enhanced Magazine Release Button
  • 1x Stainless Steel Bolt Catch Detent
  • 1x Stainless Steel Safety Selector Detent
  • 1x Bolt Catch Roll Pin
  • 1x Bolt Catch Spring
  • 1x Buffer Retainer Spring
  • 1x Selector Detent Spring
  • 1x Hex Keys for Anti-Walk Pins

Note: This is “NOT” a complete lower parts kit. This is a builder’s kit. This Kit does not include the Pistol Grip, Pistol Grip Screw and Washer, Trigger and Hammer, Trigger and Hammer Springs, Disconnect, Disconnect Spring, Trigger Guard and Roll Pin.


Part of being able to successfully defend yourself and your family involves always being prepared and regularly shooting your weapon of choice to become comfortable with it. While shooting regularly is completely necessary, it also can cause wear and tear on your weapon. If your weapon of choice is the AR15, it is wise to consider adding AR lower build kits to your shooting supplies to ensure that you always have spare parts on hand to replace worn, broken or lost parts.

How Can A*B Arms AR15 Lower Build Kits Enhance Your Shooting Experience?

The American Built Arms AR lower build kits only contain good quality replacement parts. This gives you peace of mind that you will always have what you need to be able to use your AR-15, and eliminates the concern of a low quality replacement part negatively impacting the performance of your AR-15.

Why Choose A*B Arms AR15 Lower Build Kits

American Built Arms AR15 lower build kits only include parts that were engineered to the exact tolerances that the 5.56 AR-15 rifle needs, providing a correct fit.

*Keep in mind that these are not complete AR lower build kits, they are considered to be builder’s kits.

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