Military grade 7075 T6 aluminum materials | Over 40 years experience!

AR-15 Billet 80% Lower and Jig Kit


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Available on backorder


3rd Generation Premium AR-15 80% Billet Lower Receiver

ARsUnlimited 80% Billet Lower Receiver is uniquely CNC precision mill spec machined from solid 6061 aluminum. Our design is made for the serious AR-15 builder with Additional features such as flared magwell, deep Fire / Safe engraving on right and left sides, threaded bolt catch and pin, threaded take down pin spring catch, trigger slack eliminator screw and threaded upper receiver lock. All made from premium 6061 quality aluminum. Bar none this is one of finest lower receiver on the market!

CNC Machined Billet 6061 Aluminum

Unique Mill Spec Look

Flared Magwell

In House Broaching

Upper Receiver Locking Set Screw

Screw in Bolt Catch Pin

Precision Trigger Slack Eliminator Set Screw

Threaded Take Down Spring Hole

Includes all Threaded Hardware

Bead Blast Class III Black Hard Anodized


AR-15 Jig with 1/4″ End Mill

The use of our AR-15  jig doesn’t require the use of a drill press or mill, if you have a electric drill motor and router then this is the jig for you. Jigs are compatible with most other manufactures forged and billet 80% lower receivers.  This is the easiest, fastest and most economical way to finish your lower.

2 – Side Plates, Left – Right

1 – Drill – Router Plate

1 – Trigger Slot Plate

4 – 1” Spacers

Packaged Hardware for Assembling – Instructions

* Hardware add-on  –  ¼ – 4 Flute end mill



Because this is a 80% Billet Lower it is not considered a firearm by the ATF, it does not require a FFL to be shipped door to door. We have our determination letter from the ATF stating that this item is not a firearm. Additional machining is required by the purchaser and only by the purchaser for this item to be functional with all mill spec parts kits.


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SHIPPING: All orders are typically shipped within 24 to 48 hours upon receipt of order unless items are on back order. Packages will be shipped USPS Priority Mail, typically 2 to 3 day delivery. Once your shipping label is printed you will receive tracking number to the email you provided. If product is on a pre-sale status or back order then expect longer wait times for delivery. RETURNS: You can return online purchases with the following conditions: Returns must be returned within 30 days of postmark on package or invoice date. Items must not be modified or tampered with, must be in new condition. Returns must be shipped within the United States of America.