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What is the Correct Gas System Length for my Barrel?  

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(@arch2)
Active Member Admin
Joined:3 years  ago
Posts: 17
28/09/2017 9:40 am  

What is the Correct Gas System Length for my Barrel?

The below chart shows the typical gas system lengths (distance from receiver to gas port) and how the pertain to barrel length. As you can see there are wide ranges here, typically the closer that the barrel length is to the middle of the range, the better it will function (example 14” barrel with a carbine length gas system).

System

Barrel Length

Port Distance

Pistol

Less than 10 inches

4 inches

Carbine

10-18 inches

7 inches

Mid

14-20 inches

9 inches

Rifle

20 plus inches

12 inches

 


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