This gun is very rare, but not very valuable... RMAC which at the time stood for Rockey Mountain Arms Co mfg a 22 32 and a 44 cal version of this Turrett rifle. The unique thing about the 22 is, it uses a lead 22 cal bb that loads in the breach of the bbl, then instead of black powder you fill up the turrett porton with bullseye pistol powder and use a stick cap as a primer. Like for a toy cap gun! The 32 and 44 loaded in the same manner, but used black powder and 11 precussion caps.
the genius of this was that the chamber was slightly tapered which acually form fitted the ball to the rifle lands making for a tight gas seal. This weapon probabbly failed in the market for several reasons, mostly most states had primiative weapon hunting laws that required the buttet be loaded from the muzzle. The 22 version had some remarkable claim that it was like 1/10 the cost of 22lr to shoot. I have been looking all over for one, hope to run accross one one day. In 1972 it sold for under 100.00