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 the 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.Features7075-T6 aircraft grade solid billet aluminum machined to industry leading tolerancesHand prepped for a flawless surface finishOversize, EDM machined magwell for fast smooth reloadingIntegral trigger guardPrecision threaded receiver and reamed pin holesHex screw bolt catch retentionGood match with standard, GI style uppers or Wilson Combat BILLet-AR upper receivers