Hey, this info is from a pm Hungry sent me when I asked him how to swap out the shzt irons for m1 garand or USGI real irons. I did a quick search and nothing came up. I figured that if I needed this info, than maybe somebody else did too. Especially since Hungry answered my pm like it was a forum thread. So, here it is:
Re: reinstalling m1 garand rear irons on a m305
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Taking off the old sights are goofy and hit/miss:
Flat blade screw driver to the rear windage knob pinion. About 3 turns should spin it freely.
Unscrew rear windage knob until is comes loose entirely... chinese knobs need prying off with screw driver because they are pure SHZT, most of the time.
Elev'n knob comes loose from left side. Slide out/up rear aperture
Flat blade screw driver in slot where aperture slid in/down and PRY forward. Rear spring cover and base come loose. Don't be scared / alarmed by snapping noise....
Wipe off all factory oil / grease/ toxic PCB laden lubricant and wash yer hands before you go pee... or yer #### will fall off!
Here is the assembly:
Some of you might have upgraded your rear iron sights with some USGI M1 Garand or USGI M14 replacements. Here's how to do it, just OFF the top of my head. I do this so frequently, it's like shaving my face!
GREASE the threads of the elevation pinion screw RFN (right now) and then grease the threads of the windage knob as well. This helps prevent cross threading especially if you are using NM threaded/pitch knobs/rear sight base.
Just for your reference, you experienced Garand sight users: The USGI M1 Garand thread pitch is 16 tpi (threads per inch). The NM spec to obtain 1/2 MOA per klik is 32 tpi and hence is easier/prone to cross threading. Been there, done that! Had to help another CGNutter recover from this error. years ago!
I start with the elevation knob pushed in (left or portside) as far as it can go.
Then I center the elevation pinion screw in the center of the windage knob 'window' and attempt to 'screw' windage knob into place.
Keep up the pressure (windage knob from the right or starboard side) and screw the windage knob in place until it's flush. This requires a 'feel' that cannot be described on the internet.
Sometimes I will wiggle the rear sight base left and right until the windage knobs settles as tight as it can go into the rear sight base.
Once you are flush and even and all the knobs have no further to screw in, you will know that the knobs are 'home' position because the windage knob now 'clicks' and the rear base moves left and/or right per click.
I now take a flat blade screwdriver and tighten the windage knob pinion screw 1 or TWO half clicks to obtain the tension needed to move the rear base left and / or right without having to push on the elevation pinion screw head from the left to the right with my left thumb. Go and do that right now with your M14 or M1 Garand sights. As you move the windage left or right, now PUSH on the slotted pinion screw(elevation knob) towards the windage knob. Notice the windage knob is EASIER to klik (left or right) ?
I'm hoping this will work for you. Works for me all the time!
mates!
Barney
__________________
M14 Clinics for 2012 - Make your plans now...
www dot m14hungry dot com
Owen Sound, ON 15 Sep
All M14 Clinics have been moved to "Events and Gathering" Forum: Hungry
Re: reinstalling m1 garand rear irons on a m305
--------------------------------------------------------------------------------
Taking off the old sights are goofy and hit/miss:
Flat blade screw driver to the rear windage knob pinion. About 3 turns should spin it freely.
Unscrew rear windage knob until is comes loose entirely... chinese knobs need prying off with screw driver because they are pure SHZT, most of the time.
Elev'n knob comes loose from left side. Slide out/up rear aperture
Flat blade screw driver in slot where aperture slid in/down and PRY forward. Rear spring cover and base come loose. Don't be scared / alarmed by snapping noise....
Wipe off all factory oil / grease/ toxic PCB laden lubricant and wash yer hands before you go pee... or yer #### will fall off!
Here is the assembly:
Some of you might have upgraded your rear iron sights with some USGI M1 Garand or USGI M14 replacements. Here's how to do it, just OFF the top of my head. I do this so frequently, it's like shaving my face!
GREASE the threads of the elevation pinion screw RFN (right now) and then grease the threads of the windage knob as well. This helps prevent cross threading especially if you are using NM threaded/pitch knobs/rear sight base.
Just for your reference, you experienced Garand sight users: The USGI M1 Garand thread pitch is 16 tpi (threads per inch). The NM spec to obtain 1/2 MOA per klik is 32 tpi and hence is easier/prone to cross threading. Been there, done that! Had to help another CGNutter recover from this error. years ago!
I start with the elevation knob pushed in (left or portside) as far as it can go.
Then I center the elevation pinion screw in the center of the windage knob 'window' and attempt to 'screw' windage knob into place.
Keep up the pressure (windage knob from the right or starboard side) and screw the windage knob in place until it's flush. This requires a 'feel' that cannot be described on the internet.
Sometimes I will wiggle the rear sight base left and right until the windage knobs settles as tight as it can go into the rear sight base.
Once you are flush and even and all the knobs have no further to screw in, you will know that the knobs are 'home' position because the windage knob now 'clicks' and the rear base moves left and/or right per click.
I now take a flat blade screwdriver and tighten the windage knob pinion screw 1 or TWO half clicks to obtain the tension needed to move the rear base left and / or right without having to push on the elevation pinion screw head from the left to the right with my left thumb. Go and do that right now with your M14 or M1 Garand sights. As you move the windage left or right, now PUSH on the slotted pinion screw(elevation knob) towards the windage knob. Notice the windage knob is EASIER to klik (left or right) ?
I'm hoping this will work for you. Works for me all the time!
mates!
Barney
__________________
M14 Clinics for 2012 - Make your plans now...
www dot m14hungry dot com
Owen Sound, ON 15 Sep
All M14 Clinics have been moved to "Events and Gathering" Forum: Hungry
