The PWS MK1 MOD 2 stripped lower brings a new level of ergonomics to the AR15 platform. Manufactured in Boise"" ID using 7075-T6 aluminum and black anodized hard coated"" this lower is only 7.6 ounces. The team at Primary Weapons Systems has crafted the perfect AR-15 ambi lower receiver by locating a bolt and magazine release on each side of the lower. In the box you will also receive proprietary ambi control parts