I don't understand why they used this as an "Unlock" when it wasn't even used by the Germans. This was a Czech item...what the Germans actually used was a "Winter Trigger". It was a device that locked into place inside the triggerguard an had small lever outside the guard that could be moved to fire the rifle with gloves on. 
This I think would have made a neater anmore authentic device as an upgrade. Don't have a picture handy but will try an post one, unless someone else beats me to it.
http://www.mp40.nl/index.php?page=winter-trigger
This I think would have made a neater anmore authentic device as an upgrade. Don't have a picture handy but will try an post one, unless someone else beats me to it.
http://www.mp40.nl/index.php?page=winter-trigger
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