Had one, sold it.
Lack of Side Focus was a a show stopper. Didn't realize it though till after I bought it. I have the 10x model with Side Focus now for my day 12.5 300BLK Hog gun and am very happy with it for this application (<200 yds).
Don't ask questions if you cannot handle the range of answers you might get.
If you have 14/15/16/17 forms and have not figured out how things work, you should be asking how to get forms pushed through faster, not coming up with schemes on your own. Most folks have figured it out by 5/6/7.
Not sure what problem you think you were going to solve even if they had verified the SN. A crooked dealer can easily find a valid SN to give you. Look how easy it was for you to get valid SNs for AAC and SilencerCo products.
Please name a dealer dealing in NFA that does not have a FFL/SOT.
Help-
Who makes the mount the L3 sits on? It appears it attaches via the mount hole for the standard AICS bipod?
ETA:
NM, finally figured out the correct google search terms. It is a Badger IMUNS.