I have two 12 gauge R frame receivers intact with all working parts- One is a O grade extractor gun so it has the first series roller cam extractor- with the milled pin slots in the receiver lug slot- easy to fill in, or ignore and use as is- this is from the second series when they moved from Syracuse to fulton, the front edges of the barrel lug and recess are radiused- The second is from a 1940 Field grade extrator gun, all parts- both guns were fired and tested before parting out- both have double triggers--
I know machining, tool and die welding and have welded a great number of Harley frames for custom bikes, all with a Miller 250 TIG- air cooled Linde torch with foot rheostat control- bench work, very precise. I know one way to stop a developed crack in a machining grade and case hardened steel component- drill a small hole a short distance from each end of the crack- when you pre-heat and add the interpass temperature in the HAZ, the heat stresses will follow the line of the crack, and when the reach the hole, will be "trapped there"- backstep you welds and allow to cool in heavy asbestos wraps- use Tempilstiks to determine the pre-welding heat on the area to be repaired- However, all metals transfer heat and thusly cool (also a transfering process) slightly differently- air hardening, oil hardening and water hardening steels for example- contact me via this website's famous PMS thingy, or call my cell phone numer, which be: 616-894-5019
Last edited by Run With The Fox; 10/27/09 10:29 PM.