Which is about the same as a just measured 2240 and 2260. Haven't been inside to give you an ID, but it's basically the same diameter outside as the 2240/2250/2260's tube.
..so don't know what the inside diameter might be.
Thinking about it...have had the rear end opened to adjust the power adjuster ("spring pre-tension adjuster" if you prefer)..didn't think about measuring the ID.
Even if it is the same size, inside and out, doesn't mean it's of exactly the same material or able to safely stand the same pressures.
...somewhere that a guy was putting a trigger assembly from a 2260 on a Disco and had trouble getting the sear to engage the hammer cuz the tube was thicker. Not saying it's "fact", just heard it from one source.
