Gas port erosion...

[Ridgerunner665]

I understand what it is and how it occurs...but how much will it erode?

Will it erode enough that springs and buffers wont fix it?
How many rounds before it becomes a problem?
And any other useful info you may have on the subject...

I'm new to AR's... I'm trying to learn what to watch out for. Thanks

[Robb Jensen]

I understand what it is and how it occurs...but how much will it erode?

Will it erode enough that springs and buffers wont fix it?
How many rounds before it becomes a problem?
And any other useful info you may have on the subject...

I'm new to AR's... I'm trying to learn what to watch out for. Thanks

For 99% of the people out there most of the time you'll wear out the throat of the chamber causing really poor groups (more like patterns) before the gas port is eroded. It can be fixed. I requires drilling out and tapping the gas port and installing a set screw, then drilling a new gas port through the set screw.

[Ridgerunner665]

For 99% of the people out there most of the time you'll wear out the throat of the chamber causing really poor groups (more like patterns) before the gas port is eroded. It can be fixed. I requires drilling out and tapping the gas port and installing a set screw, then drilling a new gas port through the set screw.

Thank You Sir...thats what I wanted to know.... I had searched for it but didn't find it.

[scottryan]

For 99% of the people out there most of the time you'll wear out the throat of the chamber causing really poor groups (more like patterns) before the gas port is eroded. It can be fixed. I requires drilling out and tapping the gas port and installing a set screw, then drilling a new gas port through the set screw.

At which time you might be better of buying a new barrel depending on one's situation.

[Robb Jensen]

At which time you might be better of buying a new barrel depending on one's situation.

If the throat erosion is okay but the gas port is too big, then yes for the less skilled armorer/gunsmith a new barrel would be probably the best option.

[Ridgerunner665]

Does it require any special tools to remove an AR 15 barrel...I'm no gunsmith...but I am a Master Tinkerer, I've looked at the barrel and just by guessing I'd say remove the handguards, remove the upper, remove the front sight/gas block (all of which is pinned in place)....then heres where it gets hard to see without taking it apart...to get the barrel loose...does it just unscrew from the receiver, or is it connected to the lugs somehow...

Is that even close to how it goes??? If not...educate me please.

[ST911]

For 99% of the people out there most of the time you'll wear out the throat of the chamber causing really poor groups (more like patterns) before the gas port is eroded. It can be fixed. I requires drilling out and tapping the gas port and installing a set screw, then drilling a new gas port through the set screw.

More info? My first thought is what would keep that screw from becoming an eventual/possible bore obstruction?

[Ridgerunner665]

Loctite or a spot weld...maybe...just a guess.

[Edward Hogan]

So, what causes gasport erosion?

I'm guessing not having the gasblock correctly centered over the hole?
Would another fix be to install a variable flow gas block?

[Ridgerunner665]

So, what causes gas port erosion

Hot gas and small particles flowing through a small hole under high pressure....it has an affect similar to a bead blaster (or sand blaster)