I know this has been discussed but I just need to add that I could no longer shoot my MKII with the design as it was!
With the new power levels being attained by the MKII, near on 100FPE the pellet probe screw is simply not upto the job IMO!
I found that after 10-20 shots no matter what I did the probe screw came loose (not loctited) and the damage to the screw was serious enough for me to be concerned that it may sheer.
So modified the probe retention by opening up the threaded hole in the block to clear an M4 screw and threading the probe all the way through M4.
I was worried that this may affect the presentation of the probe into the barrel but if you do it correctly it does not, the difference in the clamping force is staggering and much more reassuring, no backing out of the screw after doing this and still no need to Loctite.
The screw is a special low profile M4 caphead, the head diameter reduced to 6mm to clear the slots in the rear plate and the rear plate has been recessed on the milling machine to allow the head of the screw to sit proud.
I am very happy with this modification and in all seriousness think it should be implemented by FX in some similar way, the original screw is a danger at the MKII power levels IMO as I said before.
With the new power levels being attained by the MKII, near on 100FPE the pellet probe screw is simply not upto the job IMO!
I found that after 10-20 shots no matter what I did the probe screw came loose (not loctited) and the damage to the screw was serious enough for me to be concerned that it may sheer.
So modified the probe retention by opening up the threaded hole in the block to clear an M4 screw and threading the probe all the way through M4.
I was worried that this may affect the presentation of the probe into the barrel but if you do it correctly it does not, the difference in the clamping force is staggering and much more reassuring, no backing out of the screw after doing this and still no need to Loctite.
The screw is a special low profile M4 caphead, the head diameter reduced to 6mm to clear the slots in the rear plate and the rear plate has been recessed on the milling machine to allow the head of the screw to sit proud.
I am very happy with this modification and in all seriousness think it should be implemented by FX in some similar way, the original screw is a danger at the MKII power levels IMO as I said before.
