I'm looking to partner up with someone on this board. I have a new never fired (NOS) in wax paper wrapper MK760 F/A bolt and I'm looking to swap it with someone on here that has an original S&W 76 bolt and needs to trade it for an MK. The Smith bolt does not need to be new but needs to be in very good condition. Despite what I've read from the so called experts, these bolts between MK Arms and S&W are not interchangeable (atleast in the Smith Model). The Selector switch safety position will not engage. Thanks.