Sight Geometry
A practical bench guide to rifle sight geometry, formulas, and correction calculations — created to help gunsmiths measure accurately, understand the math, and make precise sight adjustments with confidence.
49-PAGE PDF BOOK + SIGHT GEOMETRY CALCULATOR
PRACTICAL
Real-world workshop methods
Formulas and step-by-step calculations
PRECISE
TRUSTED
Bench knowledge built on experience
WITH CALCULATOR ACCESS
A Practical Workshop Guide
This guide explains the geometry behind mechanical sight work — from reference lines and barrel taper to formulas, correction values, and material-removal decisions.
What's Inside
03
Formulas, Corrections & Calculator
Work through the formulas used to calculate sight-height difference, gravitational drop, correction values, and material removal — with access to the companion online calculator.
02
Bore Axis, Taper & Measurement
Learn how barrel outside diameter, base body height, sight-element height, and taper affect the real sight-height relationship.
01​
Reference Lines & Sight Geometry
Understand the difference between the bore axis, line of sight, trajectory, and base plane — and why confusing them leads to wrong calculations.
​This digital tool is designed to support the calculations explained in the guide. ​It helps turn your measurements into correction values more quickly and clearly so you can make informed decisions at the bench.
CORRECTION VALUES
Outputs designed to support practical bench decisions with confidence.
REQUIRED HEIGHT
DIFFERENCE
Determines the needed sight-height relationship for your chosen zero.
TAPER-CORRECTED
CALCULATIONS
Handles front and rear measurements separately.
Calculator Access Included
A dedicated Sight Geometry Calculator is included with the book.
Who this book is for
Written for gunsmiths, rifle builders, and experienced rifle owners who want to:
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Understand the geometry behind mechanical sight work
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Calculate corrections instead of relying on guesswork
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Account for bore axis, barrel taper, sight height, and sight-base spacing
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Use a structured workshop method before making irreversible cuts
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Support bench decisions with formulas, reference tables, and calculator access
Book Details
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49-page PDF workshop guide
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Sight Geometry Calculator included
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Formula-based method without manual trigonometry
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Worked example with real measurements
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Reference tables and pre-cut checklist
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Digital access after purchase
"Good sight work is not guesswork. It begins with careful measurement, sound geometry, and the discipline to check the numbers before the cut."
— ALEXANDER POPOFF