Spikes barrel gas system length

[jeepnuts]

Good evening

TDLR: does spikes have different gas lengths than other barrel makers?

Here is why I ask..

I have a spikes barrel that I’ve had for many years and it has been very accurate.

It is the same as this barrel although older.

5.56 Barrel M4 LE 16"

The barrel is one of the most critical components of your build. We only offer high quailty barrels so you can be confident that your rifle will be off to a good start with which ever barrel you decide on.

www.spikestactical.com

Before I figured out it was that barrel shown above, I was trying to figure out if it was Mid-Length or carbine length barrel.

a google search and looking at images and articles shows carbine length gas at 7” and mid length at 9”

Many sources showed this, more or less.

I measured mine at 8.25” to the gas port from the end of the barrel extension as shown . I measure the gas tube at 9.75”. Spikes lists their carbine gas tube as 9.75” and they list the barrel as carbine length.

I know the obvious answer is to just compare it to another rifle but I only have this one old reliable guy.

 

[jeepnuts]

cmshoot probably knows off the top of his head.

 

[cmshoot]

You’ve got a carbine length gas system.

 

[DirtySouth]

Gas tubes protrude into the upper receiver farther than the barrel extension, hence the extra length.

 

[jeepnuts]

Gas tubes protrude into the upper receiver farther than the barrel extension, hence the extra length.

I understand that but why is the gas port 8.25” instead of 7”

 

[DirtySouth]

That diagram shows the measuring points wrong. Measure from the gas port to the front of the extension face/shoulder, where the barrel nut rest. On a carbine length gas system, mine measures 7”, mid measures 9”.

 

[jeepnuts]

That diagram shows the measuring points wrong. Measure from the gas port to the front of the extension face/shoulder, where the barrel nut rest. On a carbine length gas system, mine measures 7”, mid measures 9”.

Thank you that makes sense. i was making a noob mistake