PWS MK1 Mod 2 receivers are one of the only forged, AMBI lowers available on the market today. Held to tight tolerances and quality controls, these lowers are a perfect way to get the strength of a forged lower with the aesthetics of a billet. Finished off and anodized per Mil-Spec (MIL-A-8625F) which is a Type III Class 2 hard anodizing process. Machined right here in Boise from proprietary forgings made specifically for PWS! Do not hesitate to build your next gas or piston upper off of these beautiful lowers. All proprietary AMBI parts are included with the lower.