Let me first say this is somewhat pointless since it's a small issue, but it's a little technicality that I'm curious about.
I'm in the middle of an AR build. The lower is done and I have a stripped upper and a BCG. If I put the upper on the lower and click in the receiver pins, does it cross the delicate SBR line? I'd like to pin them together and put in the BCG so I can try the trigger without catching the hammer, but I don't want to walk the NFA line and find out that no barrel at all is still sub 16" and is therefore bad. Anyone know where this falls?
I'm in the middle of an AR build. The lower is done and I have a stripped upper and a BCG. If I put the upper on the lower and click in the receiver pins, does it cross the delicate SBR line? I'd like to pin them together and put in the BCG so I can try the trigger without catching the hammer, but I don't want to walk the NFA line and find out that no barrel at all is still sub 16" and is therefore bad. Anyone know where this falls?