I've had a QC10 9mm gsf lower sitting in the safe for a few years, and have just never gotten around to finishing out the rifle. My new house on our farm is nearing completion, and the thought of having something easy/fun to keep on ranger/tractor has sparked a desire to finish out this sbr. I'm wanting to find a complete upper for it in the 5" range. I don't have a ton of experience with AR's so I don't want to buy an upper that's not compatible. So any advice from the guys that have sbr's on the QC10 lower would be much appreciated. And yes, I have checked with QC10, but they aren't shipping until March. I would love to get this done in the next month.
