The Remington 5 MM rimfire magnum was offered in two rifles a tube fed bolt action and a plastic magazine fed bolt action Models 591/592 1970-1974. (28,000 made and sold)
They spat out a 38 grain hollow pointed projectile at 2500 fps. These rifles in my opinion are the best squirrel guns I have ever used. No real recoil, decent quality manufacturing, absolute expansion upon impact.
I have a lot of ammo so I still shoot both of mine regularly. Two different companies make a centerfire conversion for these but I am not interested in altering my rifles. These are not collectors items or rare and unusual things, they are just fun.
The old west scrounger has been threatening for two years to have Aguila make him some loaded ammo, it looks as though they may be close.
Many people have speculated as to why remington stopped making this rifle and ammo, a representative for Eley gave me the most believable answer. ( the gun sold well and was gaining popularity among varminters) It seems that the munitions plant in New York had a disastrous fire due to the extremely volitile primer mixture neede in manufacture of this fast rimfire. The date of the fire and the last known batch of ammo are conspicuosly close.
I guess its just me and my 5mm left now.
( there were about 20,000 contender barrels made for this caliber as well)