AR Parts Shop

CSS designs, manufactures and markets many components for the AR-15/M16/M4 family of modern sporting rifles. These are high quality OEM parts suitable for new build, as well as replacement needs. All are manufactured in the USA. Please see the table below for a list of available parts. Contact us to receive specific quantity and pricing information.

  • Action Spring
  • Auto Sear Assembly
  • Bolt Catch Spring
  • Buffer Retainer Spring
  • Car Action Spring
  • Charging Handle Latch
  • Charging Handle Latch Spring
  • Cover Spring
  • Detent Take Down Spring
  • Disconnector
  • Disconnector Spring
  • Ejection Port Cover Door
  • Ejector Spring (Selector Spring)
  • Extractor Spring
  • Front Sight Spring
  • Gas Ring, Bolt
  • Gas-Ring-308
  • Hammer Spring 2 (Semi Auto Only)
  • Hammer Spring (3rd Burst or Full Auto)
  • Handguard Cap
  • Handguard Cap-Grenade Launcher
  • J-Wire
  • Magazine Catch Spring
  • Plunger Spring / Forward Assist
  • Receiver End Plate
  • Sling Swivel
  • Trigger Spring


We accept Visa, Mastercard, and AMEX
For pricing information, please email us.

Please visit our Defense & Firearms page to learn more about CSS's experience supporting the firearms and defense industry for over 80 years. You may also submit a Request for Quote or Contact Us with any questions you may have about our firearms component and assembly manufacturing capabilities.