Get an owner's manual from the maker. It may not be user adjustable. It might take a gun smith or factory trained armorer to do it.
No. Also, Marlin does not sell the barrel for the 882 as a component part. The Model 17 barrel can be installed, but again finding the barrel is a problem. The existing barrel can be relined to .17HMR. sales@countrygunsmith.net
You will have to call Ruger to find out.
This would be best left to a qualified gunsmith to perform.
If the mount can be put on the firearm, yes.
Between 90-150 dollars,depending on overall condition and a good bore.
Type your answer here... how do I adjust the trigger on Remington 799
No, the Gyphon does not have an adjustable trigger
In 1957.
It is very easy to adjust the trigger on a Model 700 Remington. Remove the rifle from the stock and there is 3 small screws you can adjust. One is for the lbs. of trigger pull, which be careful you don't make it so easy it's a hair trigger and could go off just by the jar from closing the bolt. The other is to adjust the length of trigger pull.
Try e-gunparts.com
That is the T-900 system, restricted by Marlin. sales@countrygunsmith.net