I am also offering conversion of the original 42 bolt assembly to semi auto configuration with a one piece firing pin and a needle bearing feed roller for smooth operation. The wieght of the O-1 tool steel firing pin is kept light to prevent slam fires , its light wieght also eliminates the need for a heavy return spring to help insure positive ignition with hard military primers. A delrin support is also used in the ejector tube to support as much of the firing pin as possible.
Bolts are available completly finished or assembled with the final clean up of the welds yet to be done for a slight cost savings. Individual parts are also available for folks that want to complete the work themselves. All parts are machined on precision cnc macheniry and all welding is done with proper jigs to insure the best possible part. Here is a link to a step by step tutorial with lots of pics so you can get an idea of just whats involved in the conversion. http://www.thompsonmachine.net/42bolt.htm
Cost
42 Griphousing in the white $110
42 Griphousing anodized black $140
Your bolt converted to semi configuration as pictured above $140
Your bolt converted with weld cleanup yet todo $120
Bolt extension $ 35
One piece firing pin, 0-1 tool steel $ 30
feed stud with needle roller bearing $ 25
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. Do you still have any rivets? If so I would love some. I have a 42 thats welded and now trying to get the final pieces together.
---bil
