Ok, so today I decided to tweak with my rifle and installed the PCS (polar star concave spacer). I took out the pdi nubbin as I wanted to try out my pcs due to problems I was having with my hop up.
Turns out the problem is not so much the nubbin I am using, but its the screws themselves.
You see, after I adjust the hop up screws to that sweet spot it goes something like this....
-First shot: Straight, dead on, just beautiful.
-Second shot: Same as the first
-Third shot: Way right
-Fourth shot plus rest of shots: Way right
I could not figure out the problem for quite some time, and after around 2,000 bbs put through it, I think I figured it out.
I realized that when I would adjust the screws, it was way to easy, and the screws seemed loose. They would turn with just the slightest force. This brought me to the conclusion, that after a few shots, the vibration from the rifle, causes the screws to turn themselves, readjusting the hop up.
I am thinking about trying some screw tightner substance that keeps the screws from loosening up so easily. I will still be able to adjust them, but it will take alittle more force.
I want to run out to home depot or true value today, but I wanted to know what kind of screw tightner you would recommend. Keep in mind I do not want it to be too hard to adjust, just something to keep it from loosening up so easily.