http://www.armalite.com/library/faq/faq_list.htm#2
WHAT ARE THE DIFFERENCES BETWEEN ARMALITE AND EAGLE ARMS RIFLES?
There are normally very few differences between ArmaLite and Eagle Arms brand rifles.
ArmaLite rifles are the top of the company's line. They tend to be more up to date, and include higher quality parts such as chrome lined barrels. They are produced from selected forgings.
Eagle Arms rifles are intended to compete with lower priced brands. They are extremely high quality rifles in their own right. They bear unchromed barrels as standard.
AR-10 rifles are not produced under the Eagle Arms brand. <---- NOTE
ArmaLite Lower Receivers and Lower Receiver Assemblies are NEVER sold to the public. All ArmaLite rifles are either factory or government built. ALL other brands of receivers are sold to the public, including Eagle Arms brand receivers, and thus rifles of all brands except ArmaLite may have been assembled by hobbyists.
ArmaLite rifles bear a Limited Lifetime Warranty. Eagle Arms rifles bear a Limited One Year Warranty.