These tubes have such a long track for the pump assembly it's unbelievable the difference between 1322 and 2200. I'm hoping that at least translates to a significantly easier pumping of the gun!
At first I was thinking, well why couldn't I have done this with the 760 tube, and left the back end of the tube stock (not cut an inch off) and moved everything back as I had with the 2200 tube, but of course it won't work because the front track on the 760 is so much shorter that any more length of the piston wouldn't allow air when bringing the piston back to get in to fill the valve. The 2200 is opposite, with too much air space open in the track when the piston is retracted. Shortening the valve won't work because then I won't be able to use the front trigger frame screw though I could use a hose clamp, tried that and seems to still move a little after awhile. I also have to have room for putting the fitting in the side of the valve. Lol! Lots of complaining and explaining to say I only gained 7/8" extra air volume!
Looking forward to trying it out as is, then tapping it and sticking my fitting with the 16g cartridge on as an auxiliary tank for extra shots.
Here is a picture of the two tubes side by side for reference so you can see what I mean [emoji4]


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