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A*B Arms AR Lower Parts Builder Kit


This convenient Lower Parts kit contains all the parts needed to keep your 5.56 AR-15/M-16 rifle like new.



Genuine, Mil-spec, high-quality parts for those AR-15/M-16 lower parts that wear down, break or simply get lost. With this Lower Parts Kit on hand, you’ll always have the lower parts you need to keep your rifle running smoothly. These high-quality lower parts are manufactured to precise tolerances to ensure a correct fit with your 5.56 AR-15/M16 rifle. This convenient Lower Parts Kit contains all the parts needed to keep your 5.56 AR-15/M-16 rifle like new. Kit includes:


  • 1x SFT 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
  • Hex Keys for Anti-Walk Pins


NOTE: This is a builder’s kit. This is “NOT” a complete lower parts 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.


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