why go to all that trouble///////get a lug off older mod ,,get a barrelof good quality...go to yellow pages.find a machine shop to turn the barrel down to what YOU want.....WELD THE LUG......rent a reamer and or have a smith rechamber.....chamber.....drill and tap .blue???teflon????or paint :roll: it.......its not that hard.......i had the vo tech school turn a couple gun barrel 4 me ,,,,,ok its been awhile.....its only money ....but then you have something no one else has........your own creaton......JB