For those of you that want to create the authentic look of the Soviet UC, then we have found something that you simply cannot get by without.
Our friends at Marstar are offering PTRD anti tank rifles for sale.
Not for the feint of heart or shoulder, these monsters fling the awesome 14.5 x 114 cartridge, one at a time.
Stocks are said to be limited.
I do not know of a supply for reloading components or factory ammo. Be sure to wear your hearing protection, as this round tends to 'bark' when the trigger is tugged.
Stewart
Update: try this site for pix of these huge guns.
http://www.smallarmsreview.com/pdf/antitank.pdf
Note the warning about modern ammo. I download all of mine, and we use a .50 BMG primer in a sleeve. The Rusky initiator is huge.