User Panel
User Panel
User Panel
|
Posted: 1/2/2012 8:55:35 PM EDT
[#1]
Use a straight edge or a caliper. A few fractions aren't going to hurt.
|
|
|
|
Posted: 1/2/2012 10:36:09 PM EDT
[#2]
The measuring is not the problem basically what I'm asking is what is the exact definition of sight-over-bore ... Point A is what and Point B is what
|
|
|
|
Posted: 1/2/2012 10:48:53 PM EDT
[#3]
The definition is center of objective to center of bore. Use a machinists rule, measure from center of scope tube to the bottom
gas hole in the bolt carrier. That will put you in the strike zone. |
|
|
|
Posted: 1/2/2012 10:50:55 PM EDT
[#4]
center of objective lense to center of inside diameter of bore
A - center of objective lense B - center of inside diameter of bore 
|
|
|
|
Posted: 1/2/2012 11:45:57 PM EDT
[#5]
Most optics on the AR flat tops are about 2.5 inches. It's a good rule of thumb, and any ballistic calculator will be very close within a half inch. It's close enough that the difference in the ballistic app is going to need to be field tested anyway at distance to confirm and adjust, since no app is perfect.
|
|
|
|
Posted: 1/3/2012 5:32:13 AM EDT
[#6]
Holding a ruler isn't the most precise way by a long shot.
The measurement is centerline of bore to centerline of the scope's rings. If you know your scope mount height and height of the upper's rail over the bore, you can add the two together. A Vltor MUR's rail is 1.215" over the centerline of the bore. A Larue SPR 1.5 has a ring height of 1.5". So, this combination will give you a HOB of.....2.715". |
|
|
|
Posted: 1/3/2012 6:28:54 AM EDT
[#7]
I agree with BP's measurements.
|
|
|
|
Posted: 1/3/2012 6:32:38 AM EDT
[#8]
Thanks y'all I got brain injury from fallujah so I don't know what I'd do with out y'all! I'll be paying my member fee I think
|
|
|
|
Posted: 1/3/2012 6:39:26 AM EDT
[#9]
Quoted:
Thanks y'all I got brain injury from fallujah so I don't know what I'd do with out y'all! I'll be paying my member fee I think Thanks for your service. There is a lot of info, and fun on this site. You need a thick skin sometimes though. |
|
|
Win a FREE Membership!
Sign up for the ARFCOM weekly newsletter and be entered to win a free ARFCOM membership. One new winner* is announced every week!
You will receive an email every Friday morning featuring the latest chatter from the hottest topics, breaking news surrounding legislation, as well as exclusive deals only available to ARFCOM email subscribers.
AR15.COM is the world's largest firearm community and is a gathering place for firearm enthusiasts of all types.
From hunters and military members, to competition shooters and general firearm enthusiasts, we welcome anyone who values and respects the way of the firearm.
Subscribe to our monthly Newsletter to receive firearm news, product discounts from your favorite Industry Partners, and more.
Copyright © 1996-2024 AR15.COM LLC. All Rights Reserved.
Any use of this content without express written consent is prohibited.
AR15.Com reserves the right to overwrite or replace any affiliate, commercial, or monetizable links, posted by users, with our own.
