Had a BNIW Spike's pencil barrel that wouldn't sell. Got a 9.5" Geissele Mk14 rail at Cola Warrior Northwest 5. BCM upper and SBR lower were laying around so I now have an 11.5" SBR
I prefer the look of a 10.5" rail, but this thing is light (6lb 1.6oz w/empty mag) and feels really handy!