Available on SGAmmo.

I know it’s schuster plug, looks like a m1 garand high volume gas plug. I’m asking this because my parents bought me this years ago and I was told it was adjustable. They had my gunsmith uncle put it on and he said he couldn’t adjust it when he installed it, but I was young and the gun worked. Now I need to reinstall my plug after I had to install a new stock. So what kind of plug is this?

I just picked up my expert grade reclaimed M1 Garand from the CMP yesterday. Today I put 80 rounds of 30-06 through it. It's probably the most fun gun I have now (and I have a PS90). It is also the first time that I've bruised my shoulder from shooting. lmao