It is the Polish Model 29 short rifle. Except for minor details, it is identical to the standard German Kar. 98k and fires the same 7.9mm (8mm Mauser) ammunition. F.B. Radom stands for Fabryka Brony Radom, or Radom Arms Factory, at Radom, Poland. This is the same factory that made the famous Radom pistol.
Polish rifles and pistols were well made until late in the war. They were used by the Germans in large quantities after the conquest of Poland because they used the standard German ammunition. The pistol was an FN-Browning design which looks much like the U.S. Model 1911, but is in 9mm. Both were brought back when captured from the Germans. It didn't need to "find its way" into baggage; bringing back captured enemy arms was permitted and even encouraged in some areas.
Your rifle was made in 1934 and is a beautifully made rifle, equal to any made in German, Belgium or Czechoslovakia in that era.
Polish rifles are uncommon here and there is a good collector interest, so if it is original, don't do anything to it.
Jim
