BCA (Bear Creek Arsenal) Complete upper receiver. Will work on any AR15 pattern lower reciever. 16" Carbine length gas system. Fixed Front sight gas block. 
Has less than 1k rounds through it. Cycles both brass and steel case 123 grain ammo very well.  $250

14x  28 round magazines, C-Products Duramag, Stainless Steel. These are the best mags out there for reliably feeding 7.62x39 into an AR pattern rifle. The 28 round mag allows you to carry them in a standard AK mag pouch. $280

This is for the complete upper only, not a complete fire arm. 
It will include mil-spec charging handle and handguard, aftermarket options available for more $$.

Would sell this as a bundle for $500, this saves quite a bit factor in tax and shipping. Would trade for 1k rounds of 5.56 in 55-77 grain.

Central Kansas. Inman 

Six Two Zero- 2 hundred- 42zero8