AR-15 Barrels.com - Randall Rausch is a good guy with great barrels

Bushmaster Firearms

Champion Shooters Supplies

Civilian Marskmanship Program

DPMS

Fulton Armory

JP Enterprises

Steve's Highpower Rifle Links

Creedmoor Sports

Maryland AR-15 Shooters Site

Olympic Arms

Kurts Kustom Firearms

Del-Ton, Inc.

SABLE CO. Law Enforcement and Tactical Gear Inc.

Rock River Arms

AR-15 Lower Assembly - Instructions on how to assemble an AR-15 lower.

M-16 Military Manual - The offical technical manual.

AR-15.com Ammunition FAQ - Everything you want to know about 5.56 ammunition for the AR-15/M-16 platform.

Troy's Magazine FAQ - Everything you want to know about AR-15/M-16 magazines.