Looks like a BSW barrel, which is uncommon, - BSW did supply a lot of barrels during the Republic, but by this period very few. They did supply JPS significantly, but finding one on a depot re-barrel is uncommon.
The code and what can be made of the waffenamts (WaA4) on the barrel suggest BSW made, you might do better pictures of the waffenamts. Though it will not change the value of the rifle having a scarce replacement barrel, it is interesting. In about 20 years I have only seen this use half a dozen times, - most of these went on BSW and JPS rifles, not to the depots. The most interesting thing is these few lack the 936/dfb ordnance code, which most of those supplied to JPS possess...