The 80-lower.com Elite Builder Jig is a tool designed to assist with completing 80% lower receivers for the AR-15 and AR-308 platforms. The jig is made from durable aircraft-grade aluminum and is compatible with all 80% billet, forged, and polymer lower receivers. It is designed to be easy to use and comes with a comprehensive manual to guide the user through the machining process. The Elite Builder Jig is compatible with standard AR-15 and AR-308 parts kits and includes all necessary drilling and milling templates to ensure the receiver is completed accurately and safely. The jig features an integrated drill guide and depth stop to ensure precise cuts and holes are made. It also has a hardened steel bushing and alignment pins for accurate placement of the drill bit. Additionally, the Elite Builder Jig includes a quick-release locking mechanism for easy and secure attachment of the lower receiver. The jig is reusable for multiple builds and is backed by a lifetime warranty from 80-lower.com.
Often times we get asked if the Elite Builder jig is compatible with the lower cost mil-spec polymer lower receivers. Although the inner measurements of the polymer lower receivers are identical to the aluminum lower receivers, the outer measurements are different. Attempting to use the Elite Builder Jig with a polymer lower receiver, will generate a sub-optimal result. We do not recommend using the Elite Build Jig with any polymer lower receivers.
Elite Builder 80% Lower Jig (AR-15/AR-9) (gunbuilders.com)
Compatible Lower Receivers
| Platform | Description | Approx. Cost | URL |
|---|---|---|---|
| AR-15 | Forged 7075-T6 Andodized (Mil-Spec) | $74.99 | 80% Lower Fire/Safe Marked (1-pack) |
| AR-15 | Billet 6061-T6 Anodized Black (Mil-Spec) | $89.99 | Premium 80% Lower Fire/Safe Marked Billet |
| AR-15 | Forged 7075-T6 Aluminum (RAW, Mil-Spec) | $59.99 | 80% Lower Fire/Safe Marked Raw |
| AR-9 | Glock Compatible 6061-T6 Billet Aluminum | $129.99 | AR9 80% Lower – 9mm – Billet |