Designed by Bill Wilson and the Wilson Combat design team to be the base for the ultimate precision tactical AR-15 rifle, the BILLet-AR lower receiver is 100% machined in our Berryville, AR facility. The Wilson Combat BILLet-AR receiver was engineered from the ground up to address structural design weaknesses in standard USGI lower receivers and enhance overall tolerances. The BILLet-AR lower receiver has been enhanced with an oversize magazine well for quick reloads and an integral trigger guard for gloved use and added lower receiver strength. Our extensive experience as a premier custom builder of AR-15 rifles will ensure your satisfaction with this next generation Mfg: Wilson Combat