The OP asked if it was safe to shoot. I will chime in and say that it is only safe if you use the correct ammo, the weapon is still in proper working order, and has no issues such as catastrophic cracks or other defects. Best to have a gunsmith give it the "once over" since no one can even give anything but a speculative guess without seeing the revolver and inspecting it. I think all of what I said is obvious, and I mean no disrespect in reminding the OP of this, but better to make a reminder than have someone hurt. What prompts me to make this reminder is the mention of the barrel length and the soldered-on front sight. Modifications outside the factory always raise additional questions and concerns.

Stay safe!