I have a Bushmaster Pre-ban Tactical Carbine Lower Receiver Serial Number LO321--. Receiver is conservatively rated at 98-99% in excellent condition. This lower receiver does not have a sear block and has a 4 position collapsible fiberite stock or can be had with LMT in an original type SOPMOD stock. Price with 4 position stock is $499. Would consider completely stripping the lower for $399. Buyer is responsible for shipping to their FFL holder and for insurance.