Did the locking set screw included with your M1 Gas Plug disappear? (It happens, they are slippery little suckers)
We'll send out a replacement right away with FREE SHIPPING.
M1 = 5/16-18 hollow locking set screw
Also available for our M1A Gas Plug Here: Replacement Screw for M1A Gas Plug
Posted by Raymond Gerner on 29th Dec 2016
I have been using your adjustable gas plug for the M1 rifle for several yrs. I removed it for some cleaning on my gas cylinder and it disappeared. I figured that I would have to get a completely new gas plug. I was really surprised to see that I could get a replacement part. It fit perfectly .