Tennessee Arms Company, LLC

Veteran-Owned Serving Customers since 2013

AR-308 Carbon Fiber

In Stock: 66

Starting at:

Buyer Club: $26.99

AR-308 Carbon Fiber polymer lower in DPMS Gen1 style suitable for all 308 6.5 12ga AR uppers. This polymer AR-308 blends metal threaded inserts and composite materials. Only available in Black

Buyers Club Discount applied to main product not options

Almost all of our products start as a base level stripped lower. To make your receiver a complete lower ready to be attached to the upper of your choice just add the parts you need below.

LowerPartsKits and Complete Receivers

Trigger/Pistol Grip/Mechanical Parts installed / no stock

We offer several upgrades to your build.

Triggers Available:

Aftermarket Triggers Installed

Engravings Available:

If you need more than one, add them to the cart and get a discount

Manufactured using a carbon fiber filled material makes this receiver stronger and lighter than any other AR-308 lower on the market. This receiver weighs less than 6 ounces making it significantly lighter than even a standard AR15 lower. Bigger calibers does not have to mean more weight. These receivers are easy to build using standard AR15 Parts kit and requiring only the addition of the 308 Takedown pins and Bolt Catch. Our design uses a standard roll pin for the bolt catch in place of the typical screw in design.

The AR-308 series does not have a specific set of industry standard dimensions like the AR15 has. We recommend the Bear Creek Arsenal, Aero Precision, Head Down Products, JSE Surplus, and the PSA Gen II series for the best fit. 


AR-10 lower

Posted by Noah on 7th Feb 2023

You cannot beat the value and weight for the price, but i am nervous to see how it will hold up, though it isn’t necessarily fragile. would I trust it with the strength of a metal one- no. But it gets the job done at less than half the cost. And on a budget rifle that’s adequate.

new 308

Posted by William R Girouard on 11th Jan 2023

works great

AR-308 light weight lower

Posted by Sam Brown on 23rd Mar 2022

Took forever for items to ship. After inspecting 308 lower was pleased with finish and fit

AR-308 lightweight lower

Posted by DAVID R PIERCE on 16th Dec 2021

High quality lower....thank you!

new 308

Posted by William Girouard on 2nd Nov 2021


AR-308 Lower

Posted by Danny Willard on 18th Oct 2021

Excellent product, excellent customer service, always take care of customers. I have been selling Tennessee Arms products for many years. I highly recommend them. No, I do not work for them. I am a gunsmith at Willard Enterprises in Nacogdoches, Texas

AR-10 Stripped Lower

Posted by Joseph Lloyd on 10th Aug 2021

This is my third lower from here and I have no reason to believe this one will be just as good as the other two.

AR-308 Lower

Posted by Jeffrey C Boisseau on 11th Aug 2021

I ordered this lower trying to reduce the weight of my ar-10. Against everyone telling a polymer lower is not a good idea they have weak points and will break. I have put over 100 rounds through my rifle and I have not been disappointed at all. Only suggestion I make is to buy an anti walk pin kit for the trigger as it's a tight fit but still walks out a little. Other than that holding up great and works great.

.308 lower

Posted by Jose yancey on 7th Jul 2021

This lower works perfect with my Aero precision upper!!!!

Blog Post About Product

Washington and Illinois AR15 Bans

Washington and Illinois have both recently passed laws banning the sale and distribution of assault-style weapons, high capacity-magazines, and switches that convert handguns into assault-style firearms. Both laws were met with strong opposition from gun rights groups, and in response, both states have faced lawsuits.


Quick Note: We have just moved over to this website and have not moved the reviews over just yet. Hang tight Ill get it finished shortly! Sorry for the inconvenience...