Brownells Brownells Brownells 75th Anniversary - A Shooting Heritage

17 Critical Parts For Your Lower

Parts kit contains 17 essential pins and springs for your AR lower receiver. Saves time when assembling components for a build and makes a great emergency replacement kit for small parts that are most often lost or broken.

  • Trigger Spring
  • Hammer Spring
  • 2 Hammer Trigger Pins
  • 2 Takedown Springs
  • Disconnector Spring
  • Safety Selector Detent
  • Safety Selector Spring
  • Bolt Catch Spring
  • Bolt Catch Plunger
  • Bolt Catch Coil Pin
  • Trigger Coil Pin
  • Buffer Retainer Spring
  • Buffer Retainer
  • Takedown Detent


AR-15, Issue:10, Page:033
Big Book Catalog, Issue:67, Page:034

SPECS: Kit contains: trigger spring, hammer spring, hammer & trigger pins (2), takedown detent springs (2), disconnector spring, safety selector detent, safety selector spring, bolt catch spring, bolt catch plunger, bolt catch pin, triggerguard pin, buffer retainer, buffer retainer spring, & takedown detents (2).

CMMG - AR-15/M16 LOWER SPRING KIT