I'd probably clean the bolt halves and screws very well and then Loctite them. Oil in the threads could be preventing the blue Loctite from getting a good grip. Don't forget to oil the bolt after assembly to prevent rust.
Is your buffer in good shape? My SU-22 has seen a lot of rounds in the last two years and the buffer is still like new and the only time the bolt halves were separated was to replace a broken firing pin. If the bolt hits one side of the buffer before the other side, I could see where that could cause the bolt halves to separate after repeated asymmetrical pounding.
Worst case, use red Loctite instead of blue Loctite. You'll need heat to remove the screws, but it should not vibrate apart.
Are the two halves a good fit? The mating surfaces should be flat, with no wobble.
Is your buffer in good shape? My SU-22 has seen a lot of rounds in the last two years and the buffer is still like new and the only time the bolt halves were separated was to replace a broken firing pin. If the bolt hits one side of the buffer before the other side, I could see where that could cause the bolt halves to separate after repeated asymmetrical pounding.
Worst case, use red Loctite instead of blue Loctite. You'll need heat to remove the screws, but it should not vibrate apart.
Are the two halves a good fit? The mating surfaces should be flat, with no wobble.
