For sale, AR-15 – M16 GM – Hydramatic 80% M16a1 profile lower receiver in the white, raw, unfinished aluminum. Lower is a Cerro Forge forging. Has correct GM – Hydramatic engraving and a correct serial number within the assigned number range, I have two unique serial numbered receivers, message me for choices and pictures with SN. Lower receiver has been correctly and professionally profiled to M16a1 specifications, and is NOT just an a2 lower incorrectly engraved, as most are. GM Hydramatic a1 lowers are not commonly seen or found. Perfect for a retro clone M16a1/AR-15a1 build. Selling locally for $450.00, cash only, FTF Plano, Texas or will ship, USPS Postal money order only, buyer pays for shipping and insurance by USPS Priority Mail in addition to selling price. I have a 634 A+ rating on Gunbroker and a 401 - 100% Positive rating on Ebay, I can provide my user names if requested.