break barrel replacement

Hello i have a 22 cal Benjamin prowler air rifle and have the same barrel does any one know the size of the barrel in mm i want to add a moderator too it or change the whole barrel assembly to something alot quieter..can any one help 

they do make a attachment that fits over the end of the barrel and then u can attach a moderator too it . can any one help with this ..thank u 
 
What about the 'performance' isn't good? Accuracy, velocity, etc..? I don't mean to treat you as a 'newbee', (especially since I am one!). Some of these issues may be addressed with different pellets, etc... What else have you tried outside of a barrel swap? 

I personally have had bad experiences with Crosman, so I may be biased. However, I would fear a new barrel wouldn't solve anything. A better quality airgun, (if your wallet allows), may be a better and more satisfying investment.

Good luck! 
 
I have a Shockwave in .22. I also had issues of inconsistence, so I took the rifle apart (easy to do) and found the original piston seal had cut marks from the sharp edges from the cocking groove from when it was made at the factory. I smoothed out the sharp edges, got a new piston seal and new breech seal from Crossman. I also found that the transfer port at the end of the cylinder was obstructed, the hole was 1/8th" so I drilled through the obstruction with an 1/8" bit then went to a 9/64th" bit after. I than cleaned the barrel and got some better pellets, for me the H&N Field Target Trophy 14.66 grain pellets fit the barrel much better and consistently. Now I can't miss, it shoots great!