Sight bar and leaf spring you need to drift out the pin...its under tension so you may need to push down with thumb. Sight base are tapered pins I believe so be sure you are going the right way. Website 7.62x54.net has detailed takedown instructions and lots of good pics.
"The whole of the Bill (of Rights) is a declaration of the right of the people at large or considered as individuals.... It establishes some rights of the individual as unalienable and which consequently, no majority has a right to deprive them of." (Albert Gallatin of the New York Historical Society, October 7, 1789)
"A free people ought not only to be armed and disciplined, but they should have sufficient arms and ammunition to maintain a status of independence from any who might attempt to abuse them, which would include their own government." - George Washington