Just what I was thinking, but I'm no gunsmith.Robo checking in. It looks like a tear gas cartridge in a Walther PPK clone pistol. The "crack" is the relief cut for the extractor and as such not a problem.
Advise for removing. Obtain a wooden dowel "slightly" smaller than the bore diameter. Insure the face of the dowel is at least flat or slightly recessed (cupped). WEAR SAFETY GLASSES, IN CASE OF AN OOPS!!! Insert the dowel into the muzzle until it contacts the round. Tap lightly until dislodged.
Well, this was totally pointless & stupid... You ask for advice then you then go to a gunsmith anyway? Robo (and others) had the solution nailed to the letter and you just sluff it off... GET OUT OF HERE!Thank You all for advises! Guess I'll just take it to gunsmith so he would take care of this.