FX9 complete upper 16" Looking to trade for a 4.6"

Almost new 16 inch complete upper for a FX9. It's just as accurate as the stock 18.6" barrel, but a lot nicer to swing around. It can be changed in about 10-15 seconds. It has 30 rounds through it. Comes with upper, barrel, charge handle, bolt and the flash hider shown in the pics off the rifle. Only reason I'm selling is I found a 10 inch. Asking $750  Located in Wallaceburg, prefer local deal but will consider shipping on buyers expense. I would consider a trade for the 4.6 inch upper.