lately i was speaking to a friend who extended the length of the air cylinder of his air rifle. Can anyone tell me who can do this for my Air rifle in the UK? im not sure if it's easier to have it extended or to have a longer one made. the reason is the rifle gives few shots per charge which are consistant. This is due to the 57ft/lbs output. i dont realy mind a long air cylinder if i get more shots per charge and if the price is viable.
It's a straightforward engineering job. You will require tube to a standard to hold 300bar working pressure. You will then have to get each end screw cut to take the original fittings from your original tube.
You must however make sure that the engineering is up to the required standard. It may also be advisable to get the finished cylinder hydraulically tested.
I understand that Hydrographics have done such tubes in the past.
thanks for pointing this out. will they be able to tell you how many extra shots you will get at the same velocity with this custom job? I noted right away that big bore air rifles have incredibly long cylinders.
im trying to keep up the 31grain barracuda performance between 930-907ft/s for about 18shots. if i can get this i would be pleased. im also thinking of getting a walther barrel which is of the same length as the aircylinder and threaded for moderator to make the rifle even quieter. Johann Portin alreadydid this conversion to his own Infinity rifle.
For the barrel send Drum (Leupy on here) an e-mail.
His work is nothing short of spectacular.
Hey Flimsy, Why not ask David G for advice? As long as the tubing is up to it, you could extend it, but consider an alternative, that of obtaining or making a completely new reservoir, it may be easier and safer.
Important thing is to obtain the right sort of tubing, especially if the reservoir diameter is larger than on the cz 200, the larger the diameter the better quality it has to be.
Other than that it should not be too expensive but budget also for blueing.
As far as number of shots go I would say that the improvement should be proportional to the increased volume so should be easy to work out.
And if you replace the barrel with a longer one, you will get even better FPS... so no holding back! Maybe you would consider going for .25, and possibly make better use of the air?
fx in the states do just that, extend the tube with a length of tested and safe tube. look on air guns of arizonas website , i think i saw them there.
i'll check out the FX USA.
Last edited by flims; 08-04-2008 at 06:11 PM.