Need a Stormrider spec help

So measuring mine on hand it is 12mm OD right up to the action itself. Is it turned down inside the action? That I don't know. I hope that helps though. 

I feel compelled to mention though that, if all you're looking for is a barrel, much higher quality barrel blanks/liners are available elsewhere for quite modest prices and will be much better quality than a Stormrider barrel. *shrug* 

I hope something in all this was useful. 

https://spaweapons.com/collections/lothar-walther-22-airgun-barrels

(Other calibers also available)



FX liners are also widely available. I have given consideration to threading one at both ends and holding it under tension rather than compression as FX does. Either way though cheaper and a damn sight more accurate than a stormrider and canabilizing it for the barrel .

x2 on STO’s recommendations if your budget allows.

If you do decide to go with a cheaper barrel, typically what I find are workmanship issues that need to be addressed. For example, all 3 SPA barrels I received (3 different models) had bad crowns. That’s easy enough to fix, however one had damaged rifling near the muzzle where they spun a rough crowning pilot in it, and I had to cut about 3/8” off the end of the barrel to fix it. Easy with a lathe, otherwise it’s a time-consuming effort. The good news is it now hits paintballs at 43 yards with H&N FTT about 9 out of 10 times as long as the wind is calm.

Just saying they can be tamed if you can do the work but unless you enjoy tinkering as I do, going cheap is probably a false economy.

Rifling damage:



Fixed:



Example 25 yard groups: