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.
There is a website www.rediscovered-shooting-treasures.com/mossberg that offers copies of the original factory instruction sheet for the 810 models. This is the "manual" that came with your rifle and covers a lot of information including trigger adjustment.
You will have to call Ruger to find out.
To adjust the trigger on a Marlin 17 HMR, first ensure that the rifle is unloaded and safe. Remove the trigger guard and access the trigger assembly. Locate the adjustment screw, typically found on the trigger itself; turning it clockwise generally increases tension (lightening the pull), while counterclockwise increases pull weight. Make small adjustments, test the trigger feel, and always reassemble and check for safety before use.
Recommend you let a gunsmith do it.
Type your answer here... how do I adjust the trigger on Remington 799
Best left to a qualified gunsmith
Mine has it.
I believe this rifle was made by Mossberg and is the Mossberg 46B. Do a search for photos of the 46B Mossberg to see if it is a match. If so, try Havlin Sales & Service as they may have a replacement trigger guard.
Check Mossberg Customer Service thru their website. They will need the serial number of the gun in question- model changed during production.
No. Trigger guards for these were made of plastic.
No, the Gyphon does not have an adjustable trigger
There are dozens of models of rifles and a few revolvers that fire the .17 HMR cartridge. Rifles in that caliber are made by Remington, Winchester, Marlin, Mossberg, Savage, Taurus and others.