I'm building a pistol. Already have a pile of spare parts I picked up on sale over time. Just ordered a 10.5" FN barrel, clamp on fsb and gas tube for $180 shipped. Picked up a stripped blem upper from psa for $40, upper parts kit for $25, and have the handguard sitting around that I may have paid $30 for, don't remember. Already have a good bcg to drop in, so just need that cap and muzzle device and the upper is done. I'm sitting on a pile of lowers, have a couple parts kits, just need to decide what I'm doing with the buffer tube.