The 5100 was made from 1931 to 1941. I didn't know a single trigger was available in the Springfield line. I own an old Springfield double barrel 20 gauge, serial number E67029. Is Springfield the actual model name, I see no reference anywhere to a model 5100. How do I verify what I have. Well, Apollo50, tell us what IS marked on it and maybe we can tell you something.
It is located on the left side directly above the trigger guard
$100-$140.
Pull the trigger
Depends on the shotgun.
It is a lever inside the trigger guard, forward of the trigger.
Try e-gunparts.com
The 870 Remington shotgun used to be a popular candidate for a "release" trigger.
The only way is to replace the whole trigger but it will still have a hair trigger
There is one currently on Ebay
Made by Savage/Stevens. We have trigger guards.
go to launch shotgun and grab the shotgun and pull it back and pull it forward then press the trigger
The hammer will be in the cocked position. Nothing will happen until you pull the trigger.