A Comprehensive Parts List For Building An AR-15

A Comprehensive Parts List for Building An AR-15

You’re looking to or are already in the process of building your own AR-15. With so many parts floating around, it’s hard to know every part you need for a standard AR-15 build. We’ve put together this comprehensive list of AR-15 parts from the flash suppressor to the buttstock. We’ve broken the list up by sections of the AR-15 rifle so it’s easier for you to read, print off, and use as a checklist regardless of whether you purchase an AR-15 kit or each part individually. Keep in mind that this AR-15 parts list is for a standard M4 style AR-15. Further modifications can be made to the handguard, barrel, sights, and other components.

If you would like to download and print the checklist, it’s available here:

Download AR-15 Parts Checklist

AR-15 Upper Assembly

Upper Receiver

  • Upper Parts Kit
    • Ejection Port
    • Ejection Port Cover
    • Ejection Port Cover Pin
    • Ejection Port Cover Spring
    • Retaining Cover Ring
    • Forward Assist Assembly
    • Forward Assist Plunger
    • Plunger Spring Pin
    • Plunger Detent and Spring
    • Forward Assist
    • Forward Assist Spring Pin
    • Forward Assist Spring

Rear Sight Assembly

  • Rear Site Base
  • Rear Sight Spring and Ball Bearing
  • Rear Sight Aperture
  • Rear Sight Flat Spring
  • Rear Sight Helical Spring and Ball Bearing
  • Rear Sight Windage Knob
  • Rear Sight Windage Knob Pin
  • Rear Sight Windage Screw

Bolt Carrier Group/Bolt Carrier Assembly

  • Bolt Carrier
  • Bolt
  • Bolt Gas Rings
  • Extractor, Springs, and Insert
  • Extractor Pin
  • Ejector Roll Pin and Spring
  • Ejector
  • Firing Pin
  • Bolt Carrier Key and Screws
  • Firing Pin Retaining Pin
  • Cam Pin
  • Charging Handle
    • Charging Handle
    • Charging Handle Latch
    • Charging Handle Latch Spring
    • Charging Handle Latch Roll Pin

Carry Handle Assembly

  • Carry Handle
  • Thumb Nut Assembly
  • Clamping Bar
  • Cross Bolt
  • Rear Sight Elevation Spring
  • Rear Sight Elevation Spring Pin
  • Elevation Knob
  • Elevation Index
  • Index Screw
  • Index Spring and Ball Bearing

Barrel Assembly

  • Handguard or Rail
  • Handguard Cap
  • Carbine Gas Tube
  • Delta Ring Assembly
    • Delta Ring
    • Hand Guard Snap Ring
    • Weld Spring
  • Barrel Indexing Pin
  • Barrel Extension
  • Barrel Nut
  • Barrel
  • Front Sight Post
  • Front Sight Detent
  • Front Sight Detent Spring
  • Gas Tube Roll Pin
  • Front Sight Base with Bayonet Lug
  • Barrel Subassembly
  • Front Sight Taper Pins
  • Front Sling Swivel
  • Front Sling Swivel Rivet
  • Flash Suppressor (Compensator)
    • Crush Washer

AR-15 Lower Assembly

Lower Receiver

  • 80% lower
  • Lower Parts Kit
    • Hammer
    • Hammer Spring
    • Safety Selector
    • Bolt Catch
    • Bolt Catch Plunger
    • Bolt Catch Spring
    • Bolt Catch Roll Pin
    • Magazine Catch
    • Front Takedown Pin Spring
    • Front Takedown Pin Detent
    • Takedown Pin
    • Trigger Pin
    • Hammer Pin
    • Trigger Guard Roll Pin
    • Trigger Guard
    • Disconnector
    • Disconnector Spring
    • Pivot Pin
    • Magazine Release Button
    • Magazine Release Spring
    • Safety Detent
    • Safety Detent Spring
    • Trigger
    • Trigger Spring
    • Pistol Grip
    • Pistol Grip Lock Washer
    • Pistol Grip Screw

Buffer and Buttstock

  • Sling Plate
  • Castle Nut
  • Buffer Tube
  • Buffer Spring
  • Buffer
  • Buttstock

AR-15 Build Tools

  • 80% Lower Jig
  • Jig Tooling
  • Hand Drill or Drill Press
  • Workbench
  • Vise
  • AR-15 Vice Block
  • Roll Pin Punches
  • AR-15 Stock Wrench
  • Ball Peen Hammer
  • Nylon/Brass Hammer

Leave a Reply

Your email address will not be published. Required fields are marked *