Anyone use Barra Co2 Cartridges in the Umarex M1A1 Thompson? They look a tad shorter and narrower than the Crosman to me.
I have since used both with no issues.No I use only Crossman and/or Umarex. You could measure the Barra cartridge and find out and report it in this post. I can than measure the Crossman and UMAREX and compare.