How to measure gun barrel diameter

Tacticool22 requires precise measurements of your gun barrel to ensure our custom gun parts properly fit your firearm. This is ONLY for custom work.  Any standard order does not need any measurement If you provide incorrect or fractional measurements, your adapter may not fit correctly. To re-machine your part, a $20 fee will be assessed, which includes shipping the fixed part back to you. WARNING: Before measuring, make absolutely sure the gun is unloaded. The gun’s action should be open during the cleaning process. Also, be sure that no ammunition is present in the area.

Gun barrels without a front sight

We need three measurements for barrels without a front sight:

• Measure the barrel diameter at the muzzle.
• Measure the barrel diameter 1 inch back from the muzzle.
• Gun caliber (found stamped on the barrel).

Gun barrels with a front sight

We need five measurements for barrels with a front sight:

• Measure the barrel diameter at the muzzle.
• Measure the barrel diameter 1 inch back from the muzzle.
• Measure the width of the front sight at its widest.
• Measure the step from the front of the barrel to the front of the sight.
• Gun caliber (found stamped on the barrel).

Barrel measuring tools

To properly measure your barrel, you must use quality calipers or a micrometer. DO NOT use a tape measure or ruler.