Original 3357 spotmarker.    Mainspring was broken, missing safety, damaged sight.   Patched it together using parts from .357 pellet gun.  Shoots .50 caliber paintballs which are still available through blowgun suppliers.

Modified Crosman 3357.    2k 357 pellet gun chassis modifed to accept spotmarker barrel.   This looks cool but is really a downgrade.    Now you have to remove both grips to change a 12 gram and the power of the mainspring is questionable.