FX Impact Pin Probe Tuning: The Ultimate DIY Guide to Consistent Accuracy

Fx impact M4 DIY tips and tricks for FX adjustable pin probe come to find out this one only comes in the Fx slug kit. kit contains the 14g tungsten hammer which' i don't use i use the huma air 8.5. the pin probe is good for those who shoot longer slugs reason being you can adjust the pin back and by doing so it's not being pushed too far into the breech or landings like the pellet probe will and that's where, in consistency comes from. having the pellet or slug in the wrong place. for shorter slugs' max length i have found is 49.85 overall length for the probe before the magazine starts acting up what happens is the pin is to long pushes the ammo out of the mag before the probe body enters the mag and jams right where the pin meets the probe body and that is why stationary probes don't work for some pellets and slugs has to be the proper length. I eliminated shooting the shorter slugs 7.5mm long and under, I don't shoot anymore the longer slugs that are now made with the same weight chamber and fly so much better and shows on paper, it's all the little fine tuning is what makes it consistent tolerances and clearances also, for 25 Cal guys i have a new breech Oring 6.1mm id 9mm od 1.4 C/S mine kept leaking as i put an Oring on my pin probe and when it would leak it will push the Oring all the way to the back of the probe, now its sealed and gained between 10-12 fps its all the little things like that count.