Brownells Brownells Brownells 75th Anniversary - A Shooting Heritage

Sight Height Calculator

Proper sight height is not difficult. Just remember that the goal is to make the front and rear sights the same height above the center of the barrel. And, when you make your measurements, you MUST use a caliper or micrometer. You must have a decimal answer (for example, .875) for the calculator to work. A few thousandths can have a substantial effect and this is no place for a tape measure or micrometer eyeball!

Click here to use the Brownells Sight Height Calculator.
Please make sure you have popups enabled and the
newest version of Adobe Flash Player installed
.

 

Calculating Front Sight Height
Step 1: Measure barrel outside diameter, A, and put the dimension in the Barrel Diameter at Rear Sight field.

Step 2: Measure total rear sight height, B. Put the answer in the Rear Sight Height field.

Step 3: Measure barrel outside diameter, C, and put the answer in the Barrel Diameter at Front Sight field.

Click Calculate and the Front Sight diameter, D, will be figured for you.


Calculating Rear Sight Height
Step 1: Measure barrel outside diameter, A, and put the dimension in the Barrel Diameter at Rear Sight field.

Step 2: Measure barrel outside diameter, C, and put the answer in the Barrel Diameter at Front Sight field.

Step 3: Measure total front sight height, D. Put the answer in the Front Sight Height field.

Click Calculate and the Rear Sight diameter, B, will be figured for you.