A&S Conversions
UZI Talk Life Member

I would like to ask how that would work? My understanding is that the point of a “flag” is that there is something between the bolt and the surfaces that the bolt would lock into such that it is easy to tell that there is not a live round in the chamber and there is something in the way of the bolt going fully into battery. Whether a spent shell casing or a dummy round is used, the bolt could still be put into battery. Yes a spent shell casing could be placed sideways in front of the bolt. But the shell or the charging handle could be bumped, allowing the tension of the bolt face to be lessened, allowing the empty shell to fall out. Bringing into question whether there is or is not a live round in the chamber with the bolt closed and locked. That is why most chamber safety flags have one leg in the chamber and another leg at 90 degrees that sticks out of the ejection port.Not sure if it’s allowed where you’re at but Ive used brass spent casing as my chamber flag / block
I personally have found that a brightly colored zip tie that goes through the ejection port and down through the magwell has worked well to show that there is no live round in the chamber and that the bolt is not in battery.
Scott

