2022年1月5日 · The FMK Firearms AR1 Extreme AR-15 Stripped Lower Receiver is constructed from a state-of-the-art impact-resistant Polymer that is proven to have superior strength and unmatched durability. This polymer lower receiver is extremely lightweight and is 50% lighter than an aluminum lower, which makes it ideal for lightweight AR-15 builds.

Multi-Caliber, Mil-Spec, AR15 Lower Receiver, manufactured in the USA of a high impact proprietary composite polymer. This state of the art polymer allows for superior strength, unmatched durability and is extremely lightweight only 4.3oz. The AR1 eXtreme is by far the strongest composite polymer lower on the market today.

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2017年8月24日 · FMK’s AR1 eXtreme composite lower is surprisingly durable, lightweight, American made, and fits like a glove to any of my MILSPEC uppers. I grew up in Arizona so I know that anything used outdoors and is made of plastic will get destroyed from dry heat and a little abuse. I assume this is the reason I’ve never been a fan of polymer lowers.

Manufactured in the USA of a high impact proprietary composite polymer. This state of the art polymer allows for superior strength, unmatched durability and is extremely lightweight. The Ar1 eXtreme is by far the strongest composite polymer lower on the market today.

The receiver bears the Thomas Jefferson quote, "The tree of liberty must be refreshed from time to time with the blood of patriots and tyrants." The AR1 Patriot accepts all standard Mil-Spec uppers and is compatable with most current AR-15 lower parts kits, grips and stocks. It is 100% American made.

The foundation is the key to any good project, and on an AR-15, that is the lower receiver. Superior strength – Built with proprietary composite polymer to withstand extreme conditions. Unmatched durability - When most lowers dent or break, the AR1 Extreme bounces back to …

This state of the art polymer allows for superior strength, unmatched durability and is extremely lightweight at only 4.3oz. The AR1 extreme is by far the strongest composite polymer lower on the market today.