The threads appear to be standard but you would not be able to find and off the shelf tap due to the odd diameters used. The thread into the barrel appears to be 1.0. I made the tap for the feeder thread about a year and a half ago and do not remember the exact size. I believe it was .5 but would need to remeasure to verify that. I used a caliper to measure the kit parts then converted the measurements to imperial and used the HF drill pack to get close.Originally posted by Firefyter-emt
Very cool, do I take it that the section uses a standard thread? Is there a chance you would share just what that may be?