Tac one Shooting full auto only

[meateater]

Thanks

[peeeto]

Here is the picture of my valve, I have only 1 o ring as you can see So I understand right I need one more ? Sorry for the silly question

meateater: the larger o-ring may still be inside the valve... i know that when i take my stock on/off out, the larger one stays inside and doesn't come out with the rest of the on/off assembly.

look inside the hole where the on/off came from - chances are that the larger one is still there at the bottom.

[meateater]

no its empty I checked there first but thanks again for everyone help -