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M1A Rear Sight
1/31/2012 9:36:11 PM
Have a really stupid question ? Have never really messed to much with the irons on my M1A and since I recently started my conversion to a Scout Squad I want to have a better understanding of the rear sight elevation settings, I know from reading the TM to basically set the rear sight all the way down then shoot some rounds at 100 yards and adjust accordingly and then loosen the elevation knob and set it for that distance but after looking at the knob I see there are more than just numbers on it.
Has the following:
M
11
2 thru 8
A
S
10
then back to the M
I can only assume the M is meters but I don't see a 1 for setting it for 100yrds and I surly don't understand the other letters
Sorry if this is a dumb question
Has the following:
M
11
2 thru 8
A
S
10
then back to the M
I can only assume the M is meters but I don't see a 1 for setting it for 100yrds and I surly don't understand the other letters
Sorry if this is a dumb question
2/1/2012 9:59:00 AM
The M14 is zeroed at 200 meters. If you make a correct target zero at 200 meters, each elevation click after that is supposed to give you the correct come up every additional 100 meters. The M14 can also be combat zeroed at 200 meters, making it possible to hit a man sized target with point of aim from zero to 300 meters.
2/1/2012 10:28:53 AM
honestly it may not be chic or tacticool, but every user of m14/m1 sights I know just completely ignores the elevation dial markings- go to the range - get a zero for 100 yards by clicking the sight up or down until your group is centered. write down the number of clicks it took to get on at 100- once you zero this is easy by dialing sight back down counting each click until back to bottom.- using your 100 yard zero as a starting point now do this at each 100 yard distance. take that info put it on a card and tape it to the side of the stock. Some people who don't want it on the stock will tape it inside the flip up butt plate on the 14 or just put it inside the butt trap.
2/1/2012 10:33:25 AM
Mine was shooting quite high at 200M with the rear sight bottomed out. I had to modify the sight to go lower. I don't know if this is a common thing?
2/1/2012 1:30:50 PM
Originally Posted By wildearp:
Mine was shooting quite high at 200M with the rear sight bottomed out. I had to modify the sight to go lower. I don't know if this is a common thing?
Mine was shooting quite high at 200M with the rear sight bottomed out. I had to modify the sight to go lower. I don't know if this is a common thing?
Sorta normalish. Usually thats caused by the stock putting upward pressure on the barrel. Mine was doing the same thing so I beveled down the corners of the barrel channel a little with a dremel to sorta free float it. That was on a new CMP stock though, wouldn't do that to a original.
http://m14forum.com/m1-garand-accuracy/97561-m1-accuracy-problem.html#post680705
2/1/2012 2:20:20 PM
Originally Posted By wildearp:
Mine was shooting quite high at 200M with the rear sight bottomed out. I had to modify the sight to go lower. I don't know if this is a common thing?
Mine was shooting quite high at 200M with the rear sight bottomed out. I had to modify the sight to go lower. I don't know if this is a common thing?
Sounds like your front sight was filled down at some time. Rather than modifying the rear sight, I would have thought that buying a new front sight would have been easier.
2/2/2012 2:15:04 PM
I machined my front sight down some so that I would have a 10 click up 200 yard zero. I was close to 18 or 20 up. If I still reloadded for the M1a I'd adjust the front sight so i was only +8 for 200 yard zero. this helps at the 600 yard line.
I pay zero attention to the numbers, you can adjust the dial so that the 2 lines up with your 200 meter zero. Just keep in mind that it is for ball ammo and may not work well with your ammo.
Counting clicks from bdz is a better option.
I pay zero attention to the numbers, you can adjust the dial so that the 2 lines up with your 200 meter zero. Just keep in mind that it is for ball ammo and may not work well with your ammo.
Counting clicks from bdz is a better option.
2/2/2012 4:11:37 PM
Originally Posted By captain127:
honestly it may not be chic or tacticool, but every user of m14/m1 sights I know just completely ignores the elevation dial markings- go to the range - get a zero for 100 yards by clicking the sight up or down until your group is centered. write down the number of clicks it took to get on at 100- once you zero this is easy by dialing sight back down counting each click until back to bottom.- using your 100 yard zero as a starting point now do this at each 100 yard distance. take that info put it on a card and tape it to the side of the stock. Some people who don't want it on the stock will tape it inside the flip up butt plate on the 14 or just put it inside the butt trap.
honestly it may not be chic or tacticool, but every user of m14/m1 sights I know just completely ignores the elevation dial markings- go to the range - get a zero for 100 yards by clicking the sight up or down until your group is centered. write down the number of clicks it took to get on at 100- once you zero this is easy by dialing sight back down counting each click until back to bottom.- using your 100 yard zero as a starting point now do this at each 100 yard distance. take that info put it on a card and tape it to the side of the stock. Some people who don't want it on the stock will tape it inside the flip up butt plate on the 14 or just put it inside the butt trap.
The above advice is what you should listen to. The numbers on the GI elevation knob are for GI Ball ammo and are even then only an approximation. By using the number settings, you will be continually using the same serrations on the receiver. If the serrations are getting worn down (or before you do wear them down), loosen the screw in the center of the elevation knob and twist the knob a third of the way around (and retighten the screw). Ten years from now, do it again.
2/2/2012 8:33:44 PM
Well I found out what the letters are for:
M=Meters, the AS or SA are Springfield Armory and the 2-10 are for distance using 147 ball
Oh I did find out how to do a full disassembly of the rear sight so now I can offically say I have had every part of a M1A broken down and reassembled except for putting on a barrel:
Here are a few pics,
Rear sight all taken down:
Here it is with the "O" ring on the back side:
Here is the completed assembly sitting inside the elevation knob:
And here is the completed assembly with snap ring installed:
The only thing I did different was after snapping all the pics I looked at the assembly a few times and finally ended up flipping the spring washer over, the more I looked at it the more it looked like it was supposed to be that way.
M=Meters, the AS or SA are Springfield Armory and the 2-10 are for distance using 147 ball
Oh I did find out how to do a full disassembly of the rear sight so now I can offically say I have had every part of a M1A broken down and reassembled except for putting on a barrel:
Here are a few pics,
Rear sight all taken down:
Here it is with the "O" ring on the back side:
Here is the completed assembly sitting inside the elevation knob:
And here is the completed assembly with snap ring installed:
The only thing I did different was after snapping all the pics I looked at the assembly a few times and finally ended up flipping the spring washer over, the more I looked at it the more it looked like it was supposed to be that way.
