Obsessive compulsive stupidity when cleaning ar15's

[mikecro1]

...This might be a silly question....but can any of you guys who own an OLL AR15 upper see the gas port hole when you look inside your barrel?

I really felt like a noob today...

...the funny thing is, I was cleaning my barrel and I kept trying to clean this dark looking debris (looked like a dark hair) inside my barrel using my ar15 rod guide, dewey coated rod, patches, and brush...and even my .223 boresnake...but the darn thing wouldn't come out...

...then I felt likethrowing up and hitting my self with a hammer when I realized that It was nothing more than the sillhouette of my gas port hole

....oh well....at least the inside of my barrel now looks like a mirror...

I HATE MYSELF SOMETIMES

[jandmtv]

LOL!!!, now thats some funny ****

[PolishMike]

hahah haven't done that on an AR but do it all the time on my AK pistol.

[DrunkSkunk]

lmao. that's awesome.

here's how i clean my ar - spray with clp.






what, you're waiting for more? no, that's it.

[ar15barrels]

I can see the gas port just fine.
I have a bore scope.

Here is a crappy picture of a sectioned barrel showing how the gas port wears on a carbine gas system.



The bottom hole in this picture is where the front sight base was pinned to the barrel.
It's NOT part of the gas porting.

[duenor]

yee haw!
something I said is in someone's sig line!

dude, you totally made my evening.

[ar15barrels]

yee haw!
something I said is in someone's sig line.

That's been there like almost a week dude.
I change out my sigline whenever I see something better or when it gets stale.

There's a guy with one of my quotes in his sigline.
I trip out every time I see it.

"There's no need to settle for less if you have the means to make it better" or something like that.

[ironcross]

I know how it feels, but not that far. Its like a brand new car you want it spot less. For that matter anything new. But at least its clean

[rkt88edmo]

I can see the gas port just fine.
I have a bore scope.

Here is a crappy picture of a sectioned barrel showing how the gas port wears on a carbine gas system.



The bottom hole in this picture is where the front sight base was pinned to the barrel.
It's NOT part of the gas porting.

Interesting that the wear all takes place fore of the port - I would have thought it would be a little more symmetrical but I am sure it makes perfect sense to people who understand fluid/gas dynamics

[J_Rock]

Interesting that the wear all takes place fore of the port - I would have thought it would be a little more symmetrical but I am sure it makes perfect sense to people who understand fluid/gas dynamics

I;m guessing bullet direction is from left to right in the pic correct?

[ar15barrels]

Interesting that the wear all takes place fore of the port - I would have thought it would be a little more symmetrical but I am sure it makes perfect sense to people who understand fluid/gas dynamics

The bullet and the gas go flying past the gas port.
The expanding gas then flows back into the gas port.
The gas is abrasive and wears on the edge of the port.
I have seen them with a lot more wear than is pictured.

The wear is NOT a round hole.
It's more like a slit you would see created by water flowing over the edge of a bank.
It's a narrow and deep cut.

LMT is smart.
On the MRP barrels, they just drill the gas port at a 45 degree angle so the gas will not enlarge the port over time.

[ar15barrels]

I;m guessing bullet direction is from left to right in the pic correct?

Correct.

[mike22ca]

I hate to admit it, but I totally did that with my Saiga 12. I thought I damaged the chrome lining because I shot too many slugs out of it LOL. then I actually started to think about it and was like wait.... doesnt the gas port come into play right about there? lol

[domokun]

So what's the "fix" for this issue when it occurs? How does it affect the accuracy and functionality of the rifle?

The bullet and the gas go flying past the gas port.
The expanding gas then flows back into the gas port.
The gas is abrasive and wears on the edge of the port.
I have seen them with a lot more wear than is pictured.

The wear is NOT a round hole.
It's more like a slit you would see created by water flowing over the edge of a bank.
It's a narrow and deep cut.

LMT is smart.
On the MRP barrels, they just drill the gas port at a 45 degree angle so the gas will not enlarge the port over time.

[ar15barrels]

So what's the "fix" for this issue when it occurs? How does it affect the accuracy and functionality of the rifle?

When the port wears, you need to either reduce the gas or increase the weight of the buffer/carrier train.

Most common fix is to increase buffer weight as round count increases.
Go up a notch in buffer weight about every 5K rounds on carbine gas system barrels.