AR Sponsor
Posted: 10/8/2016 7:46:09 PM EDT
|
I just finished putting together a 16" middy with a Larue Stealth barrel. I zeroed it yesterday with Magpul MBUS front and rear sights and now it's time to figure out my scope arrangement.
I've pretty much settled on a Bushnell 4.5-18x40 AR Optics scope and was kind of leaning toward a Burris P.E.P.R. 1" mount. Anyone know if this setup will give me enough height to clear the folded rear sight? If not, which mount would give the appropriate clearance? |
|
If not, don't fret. I actually went a different route and used a non QD mount for my Weaver V9 Classic (NIkon M223 one piece "slide on" mount. LOVE it! Almost as light as an AP lightweight and so simple and rugged) and opted for offset Mbus Pro BUIS. Nothing is in the way, either could be used, and the scope remains solidly mounted (no worries about POI shift). IMHO, QD mounts for scopes are not the best idea (I'm a believer in leaving it fixed to the rifle, and using offsets for back up, and even then, It's overkill). However, I dedicate my scoped uppers to just that. If someone needs to "double duty" their uppers, well then I understand the need for QD.
|
|
Quoted:
PEPR works fine with mine. http://<a href=http://i1246.photobucket.com/albums/gg601/cdbeagle/Mobile%20Uploads/image_18.jpeg</a>" /> Do you know the diameter of the eyepiece? |
|
Quoted:
1" tube on your Leupold? Do you know the diameter of the eyepiece? Quoted:
Quoted:
PEPR works fine with mine. http://<a href=http://i1246.photobucket.com/albums/gg601/cdbeagle/Mobile%20Uploads/image_18.jpeg</a>" /> Do you know the diameter of the eyepiece? That appears to be a VX-R which has a 30mm main tube. Main tube diameter should not be an issue. The issues are the height of the centerline of your mount, the outside diameter of the scope eyepiece and the height of the folded rear sight. The math formula for clearance is this: 1. Write down the height spec for the mount you are considering. That is the distance from the centerline of the rings to the top of the rail. Most mounts use this measurement rather than lower ring saddle height. That eliminates concern about main tube diameter. Most one piece cantilever mounts for ARs will be somewhere between 1.400" and 1.500" 2. Write down the outside diameter of your eyepiece. 3. Divide #2 by two. That gives you the distance the eyepiece bottom extends downward from centerline. Write this number down. 4. Subtract tbe number you got in step 3 from the number you wrote down back in step 1. 5. The result is how much clearance you have from the bottom of your scope to the top of the rail. 6. Write down the height of your folded backup sight. 7. If the number you wrote down in step 5 is larger than that in step 6, your backup will fit under the scope. I like to see a difference of at least .060" so there is a little gap. If you don't have calipers to measure these dimensions they are usually published on line for each component. This formula will work with any combination of mounts, scopes and backup sights. |
|
Quoted:
That appears to be a VX-R which has a 30mm main tube. Main tube diameter should not be an issue. The issues are the height of the centerline of your mount, the outside diameter of the scope eyepiece and the height of the folded rear sight. The math formula for clearance is this: 1. Write down the height spec for the mount you are considering. That is the distance from the centerline of the rings to the top of the rail. Most mounts use this measurement rather than lower ring saddle height. That eliminates concern about main tube diameter. Most one piece cantilever mounts for ARs will be somewhere between 1.400" and 1.500" 2. Write down the outside diameter of your eyepiece. 3. Divide #2 by two. That gives you the distance the eyepiece bottom extends downward from centerline. Write this number down. 4. Subtract tbe number you got in step 3 from the number you wrote down back in step 1. 5. The result is how much clearance you have from the bottom of your scope to the top of the rail. 6. Write down the height of your folded backup sight. 7. If the number you wrote down in step 5 is larger than that in step 6, your backup will fit under the scope. I like to see a difference of at least .060" so there is a little gap. If you don't have calipers to measure these dimensions they are usually published on line for each component. This formula will work with any combination of mounts, scopes and backup sights. Quoted:
Quoted:
Quoted:
PEPR works fine with mine. http://<a href=http://i1246.photobucket.com/albums/gg601/cdbeagle/Mobile%20Uploads/image_18.jpeg</a>" /> Do you know the diameter of the eyepiece? That appears to be a VX-R which has a 30mm main tube. Main tube diameter should not be an issue. The issues are the height of the centerline of your mount, the outside diameter of the scope eyepiece and the height of the folded rear sight. The math formula for clearance is this: 1. Write down the height spec for the mount you are considering. That is the distance from the centerline of the rings to the top of the rail. Most mounts use this measurement rather than lower ring saddle height. That eliminates concern about main tube diameter. Most one piece cantilever mounts for ARs will be somewhere between 1.400" and 1.500" 2. Write down the outside diameter of your eyepiece. 3. Divide #2 by two. That gives you the distance the eyepiece bottom extends downward from centerline. Write this number down. 4. Subtract tbe number you got in step 3 from the number you wrote down back in step 1. 5. The result is how much clearance you have from the bottom of your scope to the top of the rail. 6. Write down the height of your folded backup sight. 7. If the number you wrote down in step 5 is larger than that in step 6, your backup will fit under the scope. I like to see a difference of at least .060" so there is a little gap. If you don't have calipers to measure these dimensions they are usually published on line for each component. This formula will work with any combination of mounts, scopes and backup sights. Yep. I already did almost exactly as you described here and on paper it looks like I should have enough room. Was hoping someone had gone with the setup I want to use and could verify everything fits, but I'm pretty confident I'll be ok. Thanks for the responses, guys! |
AR Sponsor