MAC1 Bulk Fill Adapter for the Crosman 622. Just add o-rings CRS130-034 and CRS150-054U, Remove the valve assembly (CRS622-032) slide the adapter into compression tube locate it to prevent gas escaping through the CO2 Cylinder access hole on the bottom of the compression tube. The knurling on the adapter makes it hard to install but keeps in in place over the access hole. The cap at the front or the compression tube also has to be replaced.
