Chief says :::: no ! you dont have to hold anything
SHUT . if that were the case, it would be easier
to just hold the action shut ,using your thumb on
the charging handle.
The device , uses the crosspin in the trigger assembly
to lock the device into position, just like when used
as a hold open situation. (which it can still be used to do).
If you can make it out in my (bad) picture. a small
addition of metal to the activating lever is added,
this is needed to give you something extra to get ahold
of. (to set the device)
I used JB-Weld to add a piece of metal to it , later finding it was a pain in the xxs , and changed to a small
not and bolt inserted in a predrilled hole.
THIS ADDED after the weapon was completely reassembled. confused = I can post a pic.