I have a used YHM lightweight ff tube, carbine length. It has a couple of scratches as pictured. I have the jam nut which is a bit boogered up but usable and I do not have the barrel nut. I emailed YHM and they quoted me a price of about 34.00 for a replacement nut.
I'll let the tube and jam nut go for SPF to ARHabit
IM or email is fine and I'll take a usps money order. I'll also consider usgi 30 rd mags or fatory drop free G19 mags as trade.