I'm guessing this helix is a thread cut used to attach the barrel. My concern is that none of my other AR barrels have this exposed, rather large, possible thread. Seems like a good place to trap dirt and abnormal compared to my other barrels.
Do you guys think this is an issue of concern?
![Image](http://i1314.photobucket.com/albums/t565/Georgezilla/3c0c5d94-251f-4481-80fc-e4c4f951bf19_zps4af6a3ed.jpg)
Thanks.