rcc1111 3 Posted February 12, 2013 Report Share Posted February 12, 2013 First let me start off with some background on my S12. It cycled low and high brass round with no problem. I then decieded I wanted HK sights. So I took it to one of my local gun shops and had them install HK sights. I got the gun back, took it to the range and I couldn't get anothing to cycle. Took the gun home and tried to take the factory puck out and it did not fall out like it normally does. I had to beat it out a hammer and dowel rod. I figured the gun smith welded the HK sights on with the factory puck still in the gas block. Since there were deep scratches in the puck. So I took it back to my local gun shop to fix the work. Finally got the gun back and they said it runs like a champ now... Took the gun to the range again and now it cycles high brass 95% of the time and does not cycle low brass at all now. Took the gun home and tried to take the gas puck out and once again it still did not fall out. I had to use a hammer and dowel again. Only now it just took less force to get it out. I took one of the after market pucks I had and tried to see if it would fit any better and it fit even worse. I would not even do down past the threads in the gas block. So my question is Do i polish up all of my aftermarket pucks to fit the gas block? Or would it be better to hone out the gas block a small amout so I can use the my factory or aftermarket pucks? Quote Link to post Share on other sites
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