Contact the company for a manual.
Take it to a gunsmith and ask for help.
What Model 51 pistol or a rifle and what model?
Follow the instructions in the owner's manual
Yes.
Send me photos of the rifle and of the markings, and I should be able to narrow it down for you. The email address is in my bio page.
Send me your email address & I can send you a scan of the break down & original manual.
Best to ask a gunsmith for help.
You need to tell us WHICH rifle for us to give you an answer that has any real meaning. Sorry- good questions= good answers.
The link below will take you to the Auto 22 owners manual. Several photos are in the manual
Go to Remington.com and request a manaual.
Go to Browning.com and click on Customer Service. You can download or request an owner's manual.
GREAT rifle and easy to break down for cleaning, Best thing to do is unload it first then look at the owners manual as it gives a complete part break down