I have an A1 (ish) build with a brownells retro scope atop the carry handle, and I run this gun suppressed almost exclusively.
Result? Gun is overgassed. Sandman L, for those curious. Solution? Adjustable gas. Nobody seems to make one that would look right and allow me to retain a front sight, so I opted to do it the old school way.
FSB removed from the pencil barrel, I carefully drilled a hole in the side of the FSB, between the gas port and gas tube, sized for a 6-32 screw. All went well until I broke the tap in it. 3 hours of banging later, I finally broke the tap out of it.
Aside from some scratches and the finish needing some repair, the FSB is completely unharmed. However, those threads (or what's left) are completely irreparable. The hole is malformed and will not take new 6-32 threads. Or, at least, I'm not brave enough to risk breaking another tap.
Since this FSB is completely okay, I intend to use it. I have two options, best I can tell.
1. Bore the current hole out to 8-32. This is too large to advance into the gas path and restrict it, but it's suitable to plug the hole and allow me to try again on the other side, again in 6-32. This also would allow me to not risk bottoming the tap out again and breaking it, which is what happened in the first place. duncecap.png
2. Use a helicoil kit. It seems a helicoil is smaller than 8-32, and would allow me to use the existing hole without much risk. However I don't really know if the helicoil could withstand the pressure that it would be subjected to, and I really don't want to turn a set screw into a projectile.
Thoughts, or suggestions?