Remingtons first pump, the model 10, was first sold in 08 and was first called the M-10 in 1911. Next was the M-17, a 20ga pump first sold in 1919; and the M-29, first sold in 1929. All these pumps had bottom eject. The 31 replaced everything and was the first side eject model first sold in 1931. In 1933 they offered them in 16 and 20ga. They were sold from 31 to 1949 when the 870 replaced them. 1941 was when they also offered them as lightweights with a aluminum receiver. The 870 Wingmaster came out in 1950 replacing the M-31. In 18 years 189,243 M-31s were made. I'm getting a little old so I only shoot clay birds. I have a M-10, 31, and 870, a dozen or so Remington SxSs, and only shoot 3/4oz loads, so even with my lightweight 31 recoil is not a problem. The Model 12 Remington is a 22 pump rifle. Mine will chamber 22 short, long, and long rifle. It's recommended not to shoot the new hyper 22 LRs in them. It too is a nice pumping gun. It was made from 09 to 1937 and one of their best selling guns with 831,737 of them made.
The Remington "Sportsman 12" is an 870 variation designated so with engraved name that does not include "870" anywhere on it.
