Best thing is to have a gunsmith show you.
Ask a gunsmith to show you.
Best to get some assistance from a good gunsmith
Take it to a gunsmith and ask for help
Best left to a gunsmith
Best left to a gunsmith
Best left to a gunsmith
If you don't have a manual, find a gunsmith and ask for help
Best to ask a gunsmith for help
You need a gunsmith.
Take it to a gunsmith and ask for help
Ask a gunsmith for help
Take it to a gunsmith and ask for help