Smaller Peep Hole in MOE Rear?
- Thread starter rraisley
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Hockey is Life
Member
Very interesting conversation here and good ideas for raisley.
I do have a question for those that have modified the front iron sites, what did you use for the color contrast on the front sites?
Would be interested in modifing my sites, would like to know the options.
Thanks in advance for any guidance.
I do have a question for those that have modified the front iron sites, what did you use for the color contrast on the front sites?
Would be interested in modifing my sites, would like to know the options.
Thanks in advance for any guidance.
Majorlk
Member
I just used my wife's acrylic craft paint. In my case I used a bright yellow. Lime green, orange and white all work well against dark targets.
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As a user of several stock colt a2's with factory irons at work, I will tell you that their large aperture (they have 2 sizes that you select) is about 2x the size of the MBUS hole, I do not like it either for anything other than bullseye shooting. The MBUS hole is about the same size as the a2 small aperture, which my training tells me should be used when distance approaches 50 yards.
I say you will be much happier with a larger hole in your rear sight. You will be amazed at how tight the group is with that huge sight hole.
I say you will be much happier with a larger hole in your rear sight. You will be amazed at how tight the group is with that huge sight hole.
Dikinalaska
Member
So one thing to consider, are you needing to cowitness your irons and red dot? I ask because if you find a rear sight that you like a lot, but it doesn't fold you could possibly try 45 degree offset mounts for them. You said it was strictly a paper-puncher so you might not like the adjusted shooting position, but just an idea.
And I was shooting with my girlfriends father and he just picked up a new colt AR and he was having the same problem so he found a rear sight that was on like a wheel that has 4 different size holes. The wheel is slightly angled forward so you only look through whichever hole is closest to you. I'll try to find out who makes it for you but I'm sure someone here knows what I'm talking about.
And I was shooting with my girlfriends father and he just picked up a new colt AR and he was having the same problem so he found a rear sight that was on like a wheel that has 4 different size holes. The wheel is slightly angled forward so you only look through whichever hole is closest to you. I'll try to find out who makes it for you but I'm sure someone here knows what I'm talking about.
Dikinalaska
Member
Tactical Life BROWNELLS' 360-degree rotating backup rear sight
Found it. His is just like this one but this one has 3 holes that are the same size, just different elevations. His has 4 different size holes
Found it. His is just like this one but this one has 3 holes that are the same size, just different elevations. His has 4 different size holes
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Dikinalaska
Member
Ok, upon researching a little, I found they're called a rotary diopter drum sight. Hope this helps
pretty cool idea.
Thanks for the ideas. I do need the sight to fold down, as I don't want to remove it to use my PA red dot or scope. I don't think I'd be comfortable with the sights at 45 degrees, but I'm sure many get used to it. I've tried the larger hole on the MBUS, but definitely do better with the smaller one. I've seen the rotating size holes on my buddy's Colt; pretty neat, actually.
I may be overreacting a bit on the need to make the hole smaller, at least for outdoor use. Indoors, the light is such that I really have a tough time focusing so that anything is clear. Outdoors, I'm sure it will be much better. I'll have to do more comparing when outside, although may just take a piece of black tape or something, punch a small hole in it, just to see if that is really better. If so, I can make something a bit more permanent.
I may be overreacting a bit on the need to make the hole smaller, at least for outdoor use. Indoors, the light is such that I really have a tough time focusing so that anything is clear. Outdoors, I'm sure it will be much better. I'll have to do more comparing when outside, although may just take a piece of black tape or something, punch a small hole in it, just to see if that is really better. If so, I can make something a bit more permanent.
flyfishdave
Member
Eyesight and other issues not withstanding, here are some options:
http://www.tech-sights.com/inserts.htm
I use these to customize my rear sight on my 10/22 using the Techsights rear sight. You will need to drill out the smaller Magpul BUIS rear aperture to 0.125" to afford a tight fit of the Techsight apeture.
But here's the rub:
1. While the insert will clear the large aperture blade (large aperture is 0.190"), I have no idea if the BUIS will fold down without smashing the Techsight insert.
2. The Techsight insert is molded to fit snuggly into the Techsight rear 0.125" aperture which is a little thicker than the standard AR blade aperture. Not sure how tight it will fit into the blade aperture of the Magpul, even with a 0.125" hole.
3. Since the Techsights aperture will pass through both blades, folding one and switching to the large aperture may not be a simple and quick flip...there may be some intereference.
The good news is that the Techsight aperture inserts are cheap so you can do some testing before committing the Magpul to the drill press.
The above is based on your desire to retain the folding feature of a rear sight. However, if you are willing to accept a fixed AR style rear BUIS option, you have the option of purchasing after-market A2 apertures:
NM Rear Aperture (.030/.040 Aperture)
The picture in the above link is a standard small/large aperture, not the 0.030"/0.040"
This one has both a 0.030" and 0.040" aperture. I believe they also have a 0.046"/0.200" if you want to have a larger aperture for reduced light shooting. Note, most of these are NOT same plane apertures.
If you choose a red dot mount that properly positions the optic for a lower 1/3 co-witness, shooting with fixed BUIS really is not too difficult. You can raise your head slightly off the stock in an upright position, and the sights will move away from the view while you place the dot over your target.
Note, these A2 (L-shaped) apertures will NOT work with most/all folding BUIS as they will not allow the sights to fold closed properly, or simply not fit at all. It may work on the Troy BUIS but may require some grinding.
Hope this helps.
http://www.tech-sights.com/inserts.htm
I use these to customize my rear sight on my 10/22 using the Techsights rear sight. You will need to drill out the smaller Magpul BUIS rear aperture to 0.125" to afford a tight fit of the Techsight apeture.
But here's the rub:
1. While the insert will clear the large aperture blade (large aperture is 0.190"), I have no idea if the BUIS will fold down without smashing the Techsight insert.
2. The Techsight insert is molded to fit snuggly into the Techsight rear 0.125" aperture which is a little thicker than the standard AR blade aperture. Not sure how tight it will fit into the blade aperture of the Magpul, even with a 0.125" hole.
3. Since the Techsights aperture will pass through both blades, folding one and switching to the large aperture may not be a simple and quick flip...there may be some intereference.
The good news is that the Techsight aperture inserts are cheap so you can do some testing before committing the Magpul to the drill press.
The above is based on your desire to retain the folding feature of a rear sight. However, if you are willing to accept a fixed AR style rear BUIS option, you have the option of purchasing after-market A2 apertures:
NM Rear Aperture (.030/.040 Aperture)
The picture in the above link is a standard small/large aperture, not the 0.030"/0.040"
This one has both a 0.030" and 0.040" aperture. I believe they also have a 0.046"/0.200" if you want to have a larger aperture for reduced light shooting. Note, most of these are NOT same plane apertures.
If you choose a red dot mount that properly positions the optic for a lower 1/3 co-witness, shooting with fixed BUIS really is not too difficult. You can raise your head slightly off the stock in an upright position, and the sights will move away from the view while you place the dot over your target.
Note, these A2 (L-shaped) apertures will NOT work with most/all folding BUIS as they will not allow the sights to fold closed properly, or simply not fit at all. It may work on the Troy BUIS but may require some grinding.
Hope this helps.
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Ghost_Soldier
Member
Have you thought about changing the ring on the rear sight to a night sight?
If u get the night sight rear rings and the night sight post or just paint the post, your sights will line up like the 3-dot pistol sights. Just a thought.
If u get the night sight rear rings and the night sight post or just paint the post, your sights will line up like the 3-dot pistol sights. Just a thought.
Thanks, flyfishdave. Some very good information for me there. The current large hole is about 0.189", so to use the 0.125" diameter, I'd have to drill it out and insert a bushing or piece of tubing. I do like the idea of being able to easily change the hole size with inserts. The NM Rear Aperture looks good too, if it can just replace the the existing portion (that is, if it threads to the current windage adjustment screw. I can call and find out.
No problem with the co-witnessing, but I need the rear sight to fold down to clear my scope when mounted.
Again, very good ideas. I'm going to investigate these further.
No problem with the co-witnessing, but I need the rear sight to fold down to clear my scope when mounted.
Again, very good ideas. I'm going to investigate these further.
Ghost_Soldier
Member
You should be able to just replace the ring on the magpul sights.
flyfishdave
Member
The L-shape of the NM rear aperture (if you're able to install it) may not allow the rear sight to fold down. You may have a better chance if you cut off one of the apertures but this will leave you with only one option. This also assume the thread pitch of the windage screw is compatible with the aperture.
The Troy folding BUIS actually uses a double aperture that is almost L-shaped (greater than 90' angle) and HiViz does make a CSAT aperture to fit the Troy, but the CSAT uses a same plane design with a pistol sight notch for close contact engagement. There's no small 0.030" like aperture.
Your other option would be to consider the Larue fixed read BUIS with the larue QD lever, with the 0.030/0.040 NM aperture. The repeatability of the Larue QD levers are excellent and you can take them on or off as needed. Replacing the stock aperture is just a matter of punching out a small pin that holds the windage knob to the screw.
If you want to go the route of the TechSights inserts, I would consider drilling into the smaller aperture to get the 0.125" diameter hole. This would be much easier than fitting a bushing or filling the hole with devcon or some similar material.
The Troy folding BUIS actually uses a double aperture that is almost L-shaped (greater than 90' angle) and HiViz does make a CSAT aperture to fit the Troy, but the CSAT uses a same plane design with a pistol sight notch for close contact engagement. There's no small 0.030" like aperture.
Your other option would be to consider the Larue fixed read BUIS with the larue QD lever, with the 0.030/0.040 NM aperture. The repeatability of the Larue QD levers are excellent and you can take them on or off as needed. Replacing the stock aperture is just a matter of punching out a small pin that holds the windage knob to the screw.
If you want to go the route of the TechSights inserts, I would consider drilling into the smaller aperture to get the 0.125" diameter hole. This would be much easier than fitting a bushing or filling the hole with devcon or some similar material.
Thanks, flyfishdave. Some very good information for me there. The current large hole is about 0.189", so to use the 0.125" diameter, I'd have to drill it out and insert a bushing or piece of tubing. I do like the idea of being able to easily change the hole size with inserts. The NM Rear Aperture looks good too, if it can just replace the the existing portion (that is, if it threads to the current windage adjustment screw. I can call and find out.
No problem with the co-witnessing, but I need the rear sight to fold down to clear my scope when mounted.
Again, very good ideas. I'm going to investigate these further.
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what about swapping to a FO front sight?
http://smith-wessonforum.com/smith-...link-fiber-optic-front-post-quick-review.html
having a sharper dot seems like it would be easier to center in the ring. even if you do go to a smaller rear sight, having something specific to focus on up front should improve accuracy as well.
http://smith-wessonforum.com/smith-...link-fiber-optic-front-post-quick-review.html
having a sharper dot seems like it would be easier to center in the ring. even if you do go to a smaller rear sight, having something specific to focus on up front should improve accuracy as well.
I think that would be a good idea, but I don't think it will cure my main problem, which is a very out-of-focus, large rear sight circle, hard to center the front sight in accurately. But once (if) I solve the rear sight problem, I may well look into a fiber optic addition to the front sight.
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Oops, dumbest first post in the history of net forums. I have only owned my MOE 1 week but yet failed to notice that there IS a second larger aperture on the rear MBUS sight. I like them better now. Sorry guys
