If the AK47 is the equivalent to a dollar bill in the Arms Trade then the penny must be the Mosin-Nagant. There are estimated to be between 40 and 50 million still in circulation with over 35% having never been fired. They are cheap, reliable and deadly in the right situation.
The originals are still used in African conflicts to great effect while the carbine versions have been used in every South and Central American revolution or war. Of course the most famous version is the Mosin–Nagant M91/30 PU Sniper which was made famous by the Russian sniper Vasily Zaytsev and his 400 kills in WWII. While not as accurate as the Mauser or Springfield, it is cheap, durable and reliable.
When an Arms Dealer needs to sweeten a deal or open a new relationship, it’s not uncommon to gift a few hundred Mosin-Nagants with a few thousand rounds of surplus ammo. If the idea of giving away potential profit makes you uneasy, don’t worry. They will be back to buy a million stripper clips to make reloading possible.
The old expression is “Give a man a cup for free but then sell him a drink.”