Group,
I am currently running a Mesa Tactical 8-shot shell holder on top of my M4 and have a Eotech 553 on top of that. Recently while at the range, the holder came off, shells & Eotech still secured. Upon inspection, I noted the threads in the receiver are stripped, and several screws are missing. So my questions are these:
1) Can I retap the the holes, and if so what is the thread pitch & fastener type; and
2) What can I do to prevent this from happening again?
Thanks for your help all!