In this section you will find accessories sold for the AR-15 that come in Colt factory packaging and Colt AR-15 parts. There will also be information and images of Colt factory individual lower receivers as sold by Brownells and Arms Unlimited.

Part codes:

• C on bolt carrier: ?
• C MP on barrel: Colt Magnetic Proofed
• O on barrel (outside of chamber area): Chrome Lined
• E on barrel (outside of chamber area): manufactured by ESS
• MPC on bolt: Magnetic Proofed Colt
• R on barrel (outside of chamber area): Rosco/ESS
• S on selector lever: Schmidt
• W on barrel (outside of chamber area): Manufactured by Wilson
• .4 on barrel extension: Colt
• .. on barrel extension: Microbest