[hkKollector991]

Hi folks,

I recently purchased a used Legion USA AKM and I noticed this weird crescent cut in the bore. I am wondering if this is normal or if this is some damage?

 

[DK PHILLIPS]

Chopping of cutter?

 

[hkKollector991]

Chopping of cutter?

Not following

 

[Judah]

UM Gas port?

 

[hkKollector991]

What's a UM Gas Port? Sorry I am quite new to the AK platform

 

[Judah]

Does the line line up with the gas tube that protudes fron the top of the barrell? If it does its the hole in your barrell for your gas port. The port sifens off gas from the barrel which pushes your piston in the tube and cycles the action.

 

[BWilhelm]

It's the gas port.

 

[hkKollector991]

It's the gas port.

Ah so is this expected for certain import barrels?

 

[sturmtruppe303]

I remember when I was a kid and bought my first sks. I looked down the barrel and saw the gas port hole in the barrel and I freaked out 🤣🤣🤣. Good times

 

[hkKollector991]

Does the line line up with the gas tube that protudes fron the top of the barrell? If it does its the hole in your barrell for your gas port. The port sifens off gas from the barrel which pushes your piston in the tube and cycles the action.

Yes it does. It does line up to the gas tube protruding from the top of the barrel

 

[hkKollector991]

I remember when I was a kid and bought my first sks. I looked down the barrel and saw the gas port hole in the barrel and I freaked out 🤣🤣🤣. Good times

Oh that's really good. Phew, I was freaking out as well since I saw this interruption in the rifling.

Approximate location where this "issue" is found:

 

[dfariswheel]

The hole is actually drilled at a 45 degree angle.
When the AK-74 in 5.45 was being developed they found the oval shaped hole would shave the smaller 5.45 bullets, so they changed the gas block to a 90 degree so the hole would be round and not so long.
This also made it easier to drill the hole in the barrel.

 

[ammolab]

The gas port hole looks as it should…but is there a ton of metal fouling in the grooves of That bore?

 

[hkKollector991]

The gas port hole looks as it should…but is there a ton of metal fouling in the grooves of That bore?

no. This is an image of that area

 

[BWilhelm]

My Chicom AK came with a reamer tool designed to clean out the gas port. I haven't used it in over 10,000 rounds so I'm thinking it not really necessary.

But I will say HKKollector, non-roller lock rifles can be confusing to us Germans. LOL.

 

[Vladimir]

Ive only used the reamer on ak74 rifles. My Tantal especially. The ak74 surplus ammo is by far the filthiest dirtiest ammo ive ever encountered beyond black powder. Other than that the reamer is designed as your cleaning rods handle