Did the locking set screw included with your M1A Gas Plug disappear? (It happens, they are slippery little suckers)
We'll send out a replacement right away with FREE SHIPPING.
M1A = 1/4-28 hollow locking set screw
Replacement screws also available for our M1 Gas Plug Here: Replacement Screw for M1 Gas Plug
Posted by Mark Hullander on 9th Dec 2019
It is hard to adjust after every shot to fine tune it to one round. Went to tuning it from surrpressed to unsurpressed . make small adjustments on scope for rounds used. Would be nice if it had machined marks for surpressed and unsurpressed.
Posted by Jack Wayne Brown on 5th Mar 2019