Not marked. I bought it as a 10mm kit. I don't think it would be a .40 chamber but i didn't try it because i have no .40ammo. I sent all my parts to to ghillie. I guess he'll let me know what i need.From the pics that looks no good to me. i can see a gap am i correct? have u tryed other calibers? is it marked 10mm?
KZ