Beautiful rifles, Mark!
I think my gas piston nut problem is being blown out of proportion here... Each time I have shot my carbine, I'd put at least 50rnds thru her... sometimes as much as 150. The nut would back out maybe 1 or 2 turns, but NEVER completely. After each cleaning, I'd used my fingers to tighten the gas piston nut as much as possible. I have a USGI gas piston wrench, but up until recently, it was COVERED in cosmoline and I never used it. I recently cleaned the wrench and will now use it every time!
If I ever have a major problem with my IBM which causes me to rebuild it, I think I'd try to make it match original spec. In fact, I'd LOVE to put a Lumb stock on her... I just found out that Lumb was also a company from my home town, Poughkeepsie, NY. (IBM made their carbines in Poughkeepsie... which was a major factor for me buying this), AND my buddy Dan's grandpa was the shop foreman at Lumb during wartime!
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