Had a brain fart when filling out my form 1 electronic submission. At the time I had it in my head that the barrel that I was going to initially put on my registered receiver was off of an AR15 pistol I already owned. I thought it was 7.5 inches long which is what I put for the barrel length on the form. While I was visiting the website of the manufacturer last night I discovered that they say that model barrel length is only 7.0 inches long. Now my intent was to actually get a 300 AAC barrel in the 10-11 inch range down the road when it got closer the the time my suppressor stamp was due and submit the proper form notifying the ATF of a permanent reconfiguration change. So how should I go about correcting my mistake? The eform is in the pending state that will not allow me to edit it. Is this an issue for concern?