I'm a newbie to this forum. I am interested in purchasing a "M44" Russian Mosin Nagant bolt-action rifle. There is a sporting goods store in the California Bay Area where I live that is offering these rifles for sale. The ad reads "7.62 x 54R Caliber" and "Side-Folding Bayonet". It does not specify the year, but does read "Rifle condition varies by store". I researched this rifle, and it seems just what I am looking for as a rifle for self-defense. But I am worried about the ammunition. Is the 7.62x54R available for purchase, and if so, can one living in California legally purchase this ammo if, for example, it had to be mail ordered? Thanks so much for any information.