I'm using 17 ci First Strike bottle on my second Notos. I like this bottle and reg combo, shortest regulator and bottle diameter is 2" only. I did have to change the reg springs to disk type to get the pressure up to 2200 psi. getting close to 940 f/s on crosman 7.9 gr out of 16" .177 cal barrel.i think you should go with a 22ci carbon fiber bottle. Smaller diameter bottle. I really wanted to build the bottle. But I got 5 project guns and not building any more. I need to tears stuff up and sell all the project parts. I sawed out that angle like your gun hate it hitting my wrist all the time.
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