No, the triggers on 336 and other Marlin lever actions have no adjustments built in. Some gunsmiths and owners have worked over their triggers to make them better, but most just let them wear in. Aftermarket trigger springs, and mainspring kits are available from places like Wild West Guns, or Dave Clay, to make the trigger feel better. Sometimes this leads to lighter strikes, or misfires, so it's trial and error process. Hope this helps.
Yes
yes.
Best left to a qualified gunsmith
no,plain and simple
There are many places to sell a Marlin 30-30 1870-1970 Commemorative. Gun shows and online gun auctions are good places to start. Make sure to research the prices and find out the gun laws before making a sale to anyone.
No
No, there is a tandem single pole 3030 but GE does not make a tandem two pole 3030.
Marlin doesn't manufacture handguns.
You can make screen adjustments in the settings. Google Chrome has all the changes to be applied within it.
No. Yes they do: Marlin 917VS rifle
Place on fire, pull trigger, then unlock the bolt and pull back, will have a little resistance. As with all firearms make sure rifle is unloaded and pointed in safe direction.
The marlin model 995 was made by marlin between the years 1995-1999.