I am planning on getting a biathlon sling for my TRG , it will be primarly used for carry but I will use it in supported positions as well. I like the Tab sling from the intel I have gathered but would like any opinions from people who have used it , or any other sugustions. I know it carries well but how does it do as a shooting sling? Also do you leave it attaches on the left side of the rifle like when carring it or do you attach it to the rail?