i am looking to buy a 6.8 spc upper, or barrel/ bolt assembly. would like a ko-tonics barrel, chromed and 1/11 twist, but will contomplate others. used is Perfectly okay,as i am looking to make it on a budget. would like to buy barrel with matched bolt, or complete upper with bolt included. handguards dont matter, as i am wanting a yhm smooth forarm. thanks guys, brian