I got this AR on a trade and not totally digging the set up. for a 9mm i think my CX4 serves me better. so i want to either sell or trade up to a PS90. or sell the upper and do a 5.45 or AR57 conversion. or trade the conversion for something. Colt Deddcated upper w/ RRA BCG/CH and 9mm Hammer, 14.5'' CMMG M4 9mm Barrell with a perm attached smith vortex FS. Bushmaster Lower RRA LPK RRA buttstock Hahn's mag block AR Stoner Free Float Rail system (rifle length) GG&G Flip up Iron Sights (front and rear) 6 32 rd. Cproduct mags. what do you think a fair asking price for the whole rifle is? what do you think a fair asking price for everything minus the lower?