Degree of difficulty: *****
NOT fit the Crosman 160
By popular request!
This kit contains all the parts you will need to change the caliber
of your QB78, including 2 sets of the appropriate seals and O rings.
It avoids the need to buy separate Barrel, Breech and Seal Kits to
do the same job.
If you have a QB78 in .22 NOW and want to change
caliber to .177, order the .22 kit.
If you have a QB78 in .177 NOW and want to change caliber to .22, order
the .177 kit.
The barrels included in these kits are for the QB78 "standard" model which had an outside diameter of 14mm.
Will NOT FIT The QB78 Deluxe which has a 15mm outside diameter.