Complete metal body for AR15 SAEC

A complete AR-15 receiver made of metal, intended for cooperation with a gearbox and spring guide of SAEC system. The receiver is complete, it has all parts necessary for assembly as well as a mock bolt release system, so-called, Bolt-Catch. The receiver does not bear any markings. 
ATTENTION! In order to operate correctly, the receiver requires a SAEC spring guide.