The photo shows seamed tubes above seamless. The current 1938B shot tubes have been very good. Look into the muzzle end at the end of the shot tube. If it's got a crown and is made from seamless tubing, it's a good one. If it has a visible seam, it's not a "good" shot tube- but it still could shoot well. Generally, the seamed tubes are inferior to seamless. But if you happened across an exceptional shot tube, there could be a benefit to fitting it to the 1938B abutment.
Thanks for the pictures Mark, I hate that ratchet sound so I will remove the trigger springs and cut off the ratchet with a cutting wheel on a rotary tool. I think the brass tube it is mounted on helps to steady the unit . If you cut off some length it might cause some trigger wobble side to side. I will make a cap from 7/8" diameter black Delrin rod to protect the extended barrel on the front & drill it for the barrel diameter then epoxy to the existing sight cap so it will be a matching extension cover. I have some ideas for adjustable sights too as I can tell this barrel shoots BBs like a laser beam and needs better sights.
Quote from: Van on September 16, 2021, 10:44:10 PM Thanks for the pictures Mark, I hate that ratchet sound so I will remove the trigger springs and cut off the ratchet with a cutting wheel on a rotary tool. I think the brass tube it is mounted on helps to steady the unit . If you cut off some length it might cause some trigger wobble side to side. I will make a cap from 7/8" diameter black Delrin rod to protect the extended barrel on the front & drill it for the barrel diameter then epoxy to the existing sight cap so it will be a matching extension cover. I have some ideas for adjustable sights too as I can tell this barrel shoots BBs like a laser beam and needs better sights.In case the photo wasn't clear, the brass tube that the steel anti beartrap rack pivots on is not cut. Only the steel rack itself is cut in two places so it can be removed from the intact brass tube.