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Hi I have a new and unfired. Sabre Defence 18in SPR upper. This is a 18in. Sabre SPR barrel Fluted, Chrome lined. 1/8 twist, M/P tested. With a Mid-lenth gas system. Std. A2 F/H. On a MEGA machine M4 upper. Comes with a MEGA Forged chargeing handle and complete Mil-speck M/P tested Sabre Defence bolt group. Upper has a textured Free Float tube. With a PRI front rail for Buis and stud for Bipoid. This is a complete new and unfired upper. Just drop it on your lower and go. Fincal problems forces sale. $600 shipped. Money orders or personal check ok. FTF in the Salem -Albany - Portland area also. Upper from PK firearms.