This new ATI AR-15 Milsport stripped lower receiver is marked multi-cal and made from aluminum. Lifetime warranty from ATI and ships for $15 to the continental U.S.  No card fees added at Deals on Guns. ATI website;
Manufacturer American Tactical Inc
Model MilSport
UPC 892756002687
Action Semi-Automatic
Ar-15 Accessory Y
Caliber Multi-Caliber
Dimension 2.65 X 10.65 X 4.90
Finish Black Matte Anodized
Firearm Fit AR-15
Gun Model AR-15
Gun Type AR Platform
Material 7075 T6 Aluminum
Metal Finish Colored
Receiver Description 7075-T6 Aluminum
Receiver Finish Black Anodized
Receiver Material 7075-T6 Aluminum
Similar Items Lower
Stock Finish None
Stock Material None
Trigger None
Type Stripped