M1A/M14 rear sight help

Thresher

Thresher

CGN Regular
GunNutz
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East of the Rockies
Alright, I know how it works and the relationship of the parts to each other, but I still am getting frustrated trying to get it together and have the aperature index properly. Also, when the sight is all the way down I'm guessing that should be your 100 meter setting, when mine was all the way down it wass at 1100meters, so I took it apart to calibrate it much like I had to do with my AR15A2 when it didn't show the proper range when all the way down. Any help /small tricks, hints for getting it back together would be greatly appretiated!

Thanks guys
 
Thanks, I got that part down. Does anybody else's sight read "11" when the aperature is dialed all the way down?? I would like it indexed so the aperatures elevation properly correlates with the range setting on the drum, so when I have a known distance ie; 400 meters I can dial the drum to "4" and hold center and expect a grouping fairly close to P.O.A.

Thanks guys
 
Don't drive yerself crazy. The M14 and M1 sights (pretty well the same unit except for yards (M1) and meters (M14) markings, are designed to be a no-brainer when it comes to calibrating or matching up your indexes to the appropriate range(s).

Most rear sights will line up for a 100 yard/meter zero within 10 to 15 kliks from absolute bottom (bottom the aperture right out). Roger so far ?

Take a flat bladed screw driver and loosen the rear elevation pinion screw until the elevation wheel spins freely(forward is easiest). I like to set it about 10 kliks BEYOND the 100 yard/meter mark.

Then head to your range and zero the rifle. Keep zeroing the rifle until your group is where you want your sights to be.... or simply put, zero your rifle for 100 yards. NOW, after you finish.... COUNT the number of kliks you need to bottom out the aperture. Write it down (in yer shooting notebook). Don't have a shooting notebook ? Then steal yer kid's notebook and get one started. LOL

I like to do this job at home where it's easier, but if you do it at the range, it's a little more work.

ONCE you've got the number of kliks from absolute bottom to yer 100 yard zero. Line up the 100 yd index to the index mark on the left rear sight housing (part of the reciever). I like to rotate the elev pinion knob FORWARD... the aperture is bottomed out and it ain't going anywhere.

NOW ROTATE the free wheeling elevation pinion knob FORWARD the NUMBER of kliks you counted (absolute bottom to 100 yd zero).

Tighten the elev pinion knob screw (not too tight, just snug enough)

Again ROTATE the (now tightened) elev pinion knob until the aperture is TOPPED out (nice and high).

Tighten the elev pinion knob screw (just snug, once again)

You're done.

Here's the TEST ! Bottom out your rear aperture and close your eyes (don't peek !)

Rotating the elevation pinion knob rearwards (aperture rises, right ?) the number of kliks from absolute bottom to your recorded 100 yard zero.

You SHOULD now be at the 100 yard index mark.

I hope all of this makes sense. It's coming from my competition years. I've long since memorized the manual and done this operation hundreds of times. I'm typing this out from my memory.

See if it works for you. It has for me.

Barney
 
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