Blasting issue, please help??

[007]

I had my new AK blasted by a professional before the final assembly and the barrel was not plugged during the process.. The end result was the first part of the chamber, where the shell seats, is blasted pretty raw. Looking down the barrel doesn't show very much damage, the majority of the bore with the rifling is pretty shiny and still looks new, maybe slightly cloudy as you get closer to the receiver, but it hasn't been cleaned since the blast treatment. This was a virgin krink build and I'm pretty bummed to come so far and have an issue like this at the finish line. Will this have a negative effect on the function of the rifle? Is there any way to remedy this or will it smooth out on its own after having been fired numerous times? Let me know what you think. Thanks

[ASD1]

I had my new AK blasted by a professional

No you did not. A "professional" would have plugged the Barrel

[007]

Professionals make mistakes too I guess. I'm not going to slam who did it, what's done is done, now what?

[PaperPuncher]

Make them aware of their mistake.

Ask them how they want to handle. I.E. replace/fix now, let you shoot it to see how it goes and replace/fix if needed, some other option/s you both agree to, etc...

I would just ask/have them pay the cost to replace the barrel or repair whatever damage they caused. Might buff out with a few rounds, might end up with a sticky chamber. No way to know until you clean and fire it. Probably going to wonder if this is the cause of any future issue you come across if you don't get it fixed to your satisfaction.

Definitely don't create/execute a plan in your head that you think they will agree to after the fact.

[007]

I looked and original virgin yugo m92 barrels go for 89.99 plus shipping. Hope it doesn't come down to that.

[kcstott]

well out of the 347 rifles built at various build parties I've attended a mild misdirection of the nozzle to dull the chamber will have ZERO effect on the function of the weapon. I've never plug a barrel but i've also been very conscious of where the nozzle is pointed. what little bit of dulled finish that did occur was easily polished out with some semi chrome. and a felt bob.

I don't care if it's raw or chromed it will have ZERO effect.

Now if he used crushed glass or super course media and the chamber is rough as a cobb then you have a valid issue.

[007]

Thanks! The first inch + of the chamber is just as raw as the outside, after that it shows less and less. I will try to polish it as best as I can and go from there.

[kendog4570]

Just slot a dowel and polish it out with some 320 wet or dry cloth run with a drill motor. It's really no big deal.

[ThatFishGuy]

I wouldn't use 320 grit... I'm no ak expert but wouldn't that still remove too much material? Seems like a good way to end up with a really loose chamber

[kendog4570]

I wouldn't use 320 grit... I'm no ak expert but wouldn't that still remove too much material? Seems like a good way to end up with a really loose chamber

It's a chamber. AND an AK. Just knock the high spots off and shoot it, unless you want to spend a ton of time lovingly caressing it with Mothers and Flitz for no advantage.
320 is standard polish on all chambers. There needs to be a little "grip" for the case to adhere to. Anything finer adds no value, and can significantly increase bolt thrust.
A quick clean up polish will not appreciably enlarge the chamber. And even if it did, it's an AK!!

[Jimi Jah]

It's an AK. Not as it it was ever accurate in the first place?

[kcstott]

It's an AK. Not as it it was ever accurate in the first place?

No not really. the term it's an AK also applies to it's an AR meaning it's primary design is to make hits on a man sized target 0-300 meters. with a side benefit of being able to keep peoples heads down while you maneuver. it's not a bolt gun, It's not a Mk11, it's not a sniper rifle.

that and 320 wont hurt it in the least. even in a power drill if you ran it just long enough to put a shine back in the steel you may have removed .00005"

[ThatFishGuy]

Show's how much I know lol. I just know what I do with 320 grip sandpaper, and it definitely does some reshaping. But I don't really do chamber work. listen to these guys^

[kcstott]

Show's how much I know lol. I just know what I do with 320 grip sandpaper, and it definitely does some reshaping. But I don't really do chamber work. listen to these guys^

320 wet or dry is damn near polishing paper.. Grip paper??? don't know what that is unless you mean grip tape??

[ThatFishGuy]

Grit** Darn auto correct got me for the millionth time.