Anyone ever had their rear sight aperture rachet back down to flush upon recoil?  Placing the sight 1-2 clicks up in elevation seemed to fall back down to flush on me.  

I had the same problem.  I thought there was something seriously wrong with my rifle when I experienced the problem.  I sent an e-mail to Fulton Armory and the responding e-mail told me how to fix the problem.

There is a slotted head nut on the right side of the rear sight knob (windage knob) that needs to be snugged up.   Get a good fitting screwdriver to snug it up while holding the elevation knob with something that will not mar the finish.   On an older well worn rifle the teeth on the elevation disc may be badly worn and you may have to replace the elevation disc.

 

Quoted: I had the same problem.  I thought there was something seriously wrong with my rifle when I experienced the problem.  I sent an e-mail to Fulton Armory and the responding e-mail told me how to fix the problem. There is a slotted head nut on the right side of the rear sight knob (windage knob) that needs to be snugged up.   Get a good fitting screwdriver to snug it up while holding the elevation knob with something that will not mar the finish.   On an older well worn rifle the teeth on the elevation disc may be badly worn and you may have to replace the elevation disc.

Well, that worked like a charm.  Thanks for the to-the-point response!

I had the same problem.

Replaced the entire bastage with new USGI for $60.....

had the exact same problem the other day, did what he said, tightend the screw on the windage knob. and it seems to work fine now, took out my SA M1A today, shoots great,  using South African ball ammo. best ive got so far is 5 shot groups a little under 2 inches open sight with a pretty much shit for a rest. cant wait to get a scope on it.

Quoted: had the exact same problem the other day, did what he said, tightend the screw on the windage knob. and it seems to work fine now, took out my SA M1A today, shoots great,  using South African ball ammo. best ive got so far is 5 shot groups a little under 2 inches open sight with a pretty much shit for a rest. cant wait to get a scope on it.

I have an M1A with a TRW barrel that produces the same groups with the same ammo. (South African R1M1)

i believe mine is just the stardard M1A barrel,  yeah that is the same ammo, i seen them markings on the back of my cases