back bottle ASA Bolts/Screws???

[LK-13]

OK what is so unique about the Back Bottle ASA bolts/Screws?
What thread are they?
What head?
I have a rail with 2 holes in the correct position for the BB ASA but they are not threaded,
is the ASA threaded?
if yes the holes in the rail i have do not have a recessed area on the valve side of the rail,
do the screws "press fit" into the rail?

anyone have pictures of the parts of an AGD Back Bottle ASA set up?
I'd like to see all the parts close up if possible.

thank you for your time.

additionally,
i may be adding a Thompson stock to one of my Mags using these mounts.

[secretweaponevan]

Should be 10-32. You need a back bottle adapter. A bottom line adapter will not work.

The back bottle adapter has threaded holes that are not drilled all the way through. They also have lions on them! (usually)

You might have to countersink the holes. The holes became more and more vestigial over the years. The latest rails only have divots in the correct spot IIRC.