9x19 long recoil semi auto pistol barrel

grabcad

this is the barrel of a striker fired pistol that i begun designing when i was 15. i started on blender and finished the blender model the day before 2014 (it actual only took me about 24 hrs to finish but i only continued it when i felt like it). this whole project has many problems that mainly start from feeding, the only way to get an effective feed is to re caliber to .380 ACP which is not hard but the low power will not be able to cycle the long recoil operation reliably so blowback would be the obvious problem fix however the lack of barrel movement will not be able to eject the casing(the barrel has a long extruded part which locks and also ejects the casing).